Empirical and Molecular Formulas

Key Questions

• What is a molecular formula?

  Answer:

  The full formula of a molecule. It states how many of each element in the molecule.

  Explanation:

  In a molecular formula, it states the total number of atoms of each element in a molecule.

  For example, the molecular formula of glucose is `C_6H_12O_6`, and we do not simplify it into `CH_2O`.

  And for each compound, they all have a molecular formula, but some can be similar, and those are called isomers, which are common in organic chemistry.

  Mixtures do not have a single molecular formula, as they are made of many different compounds.

  Nam D. · 2 · Mar 18 2018

• How do empirical formulas and molecular formulas differ?
• How do you find molecular formula of a compound?
• What is the chemical formula of a diamond?
• What is the chemical formula of a carbohydrate?
• What is the empirical formula for valproic acid?
• What is the empirical formula of magnesium oxide?
• Why is the empirical formula not double that of the monosaccharides?
• Question #5c3b5
• What molecular formula represents a carbohydrate?
• What is the molecular formula of vinegar?
• What is the molecular formula of gold?
• What is the molecular formula of a diamond?
• How can I calculate the empirical formula of copper sulfide?
• How can I calculate the empirical formula of MgO?
• How can I calculate the empirical formula of an oxide?
• How can I calculate the empirical formula of butane?
• How do you calculate the empirical formula of a hydrate?
• How can I calculate the empirical formula of magnesium oxide?
• How can you determine the molecular formula of a substance from its percent composition?
• Can the empirical formula of a compound be experimentally found?
• How can molecules with the same molecular formula be different?
• How can a chemical formula be experimentally determined?
• What is a molecular formula?
• What are some examples of empirical formulas?
• Question #8aff5
• Question #c3e63
• Question #16ac1
• An oxide of an element has the formula `"X"_2"O"_7` and contains 50.45 % oxygen. What is the atomic mass of the element?
• A sample contains `"21.96% S"` and `"78.04% F"`. What is its empirical formula?
• Question #ba207
• Question #1b7d3
• Question #95391
• Question #c6029
• Question #4bd23
• Question #72394
• Suppose I am trying to determine a compound that has 15.87% carbon (C), 2.15 % hydrogen (H), 18.5% nitrogen (N), & 63.41% oxygen (O) (n.b., this does not equal exactly 100%): what is the empirical formula of the compound?
• I am trying to determine a compound 80.48% carbon (C), 7.37% hydrogen (H), 9.39% nitrogen (N), 2.68% oxygen (O) - what is the empirical formula of the compound?
• Question #765f8
• Question #579cc
• Question #93554
• Question #3117e
• Question #df0c6
• An oxide of aluminium is formed by the reaction of 4.151g Al with 3.692 g O. How to calculate its empirical formula ?
• Question #c96db
• Question #5f89f
• Question #97a05
• Question #a7629
• Predict the effect of each of the following by mass of water in the hydrate and the chemical of the hydrate? a) not heating the hydrate enough b) overheating the hydrate and producing some copper (ii) oxide
• Question #f957c
• Question #efd75
• Question #f2c30
• How many C-C bonds are there in Hexene? What is the structural formula for Hexene?
• Question #7f838
• Question #90eab
• Question #a1833
• Question #ef14a
• Question #0fe92
• Question #a7e06
• The elemental mass percent composition of succinic acid is C 40.68% , H 5.12% , and O 54.19%. What is the empirical formula of succinic acid?
• Question #f9ffd
• The given percent composition of an organic compound is `48.76% "C"` and `8.04% "H"`. Its molecular mass is `"74 g/mol"`. What are its empirical and chemical formulas?
• If the empirical formula is `C_2H_5`, and the molecular mass is `58*g*mol^-1`, what is the molecular formula?
• Part A: Determine the empirical formula when the elemental composition by mass shows: 40.0% C, 6.71% H, 53.3% 0. For that I got CH2010 simplified to CHO5 Part B: Determine the molecular formula when the mole mass of the compound is 90.08 g/mol. (Help?)
• Question #18ab0
• Question #19944
• Question #a1c12
• Question #a32e5
• Question #6d48d
• A 0.596 g sample of a gaseous compound containing only boron and hydrogen occupied 484 cm^3 at STP. When ignited in excess oxygen all the hydrogen was recovered as 1.17 g of water, and all the boron was present as B2O3. What is the empirical formula?
• How would you find the molecular formula from the empirical formula?
• What is the empirical formula, if given the following percent composition: 62.1% C, 5.21%H, 12.1% N, and 20.7% O?
• What is the empirical formula for C3H6O3?
• Elemental analysis of a compound showed that it consisted of 81.82% carbon and 18.18% hydrogen by mass, how many hydrogen atoms appear in the empirical formula of the compound?
• Is H2O an empirical formula?
• What is the empirical formula of N2O5?
• What is the empirical formula of H2O2?
• What are the empirical formulas for C9H20, P4O10, and B2H6?
• What is the empirical formula of a compound that is 75% carbon and 25% hydrogen?
• What is the empirical formula for the compound P4O6?
• What are the empirical formulas for tetraphosphorous decaoxide (P4O10) and ethane (C2H6)?
• What is the empirical formula of C5H10?
• What is the empirical formula of Vanillin?
• What is the empirical formula for glucose?
• What is the empirical formula of ethylene glycol?
• What would be the empirical formula of ethane?
• What is the empirical formula for magnesium hydroxide (milk of magnesia)?
• What is the empirical formula of magnesium chloride if 0.96 g of magnesium combines with 2.84 g of chlorine?
• What is the empirical formula of C2H4O2?
• If a 2.60g sample of titanium metal chemically combines with chlorine gas to form 10.31g of a titanium chloride, what is the empirical formula product?
• The compound adrenaline contains 56.79% carbon, 6.56% hydrogen, 28.3% oxygen, and 8.28% nitrogen by mass, what is its empirical formula?
• Oxalic acid is 26.68% carbon, 2.24% hydrogen, and the remainder oxygen, what is its empirical formula?
• What is the empirical formula for butane?
• How would you determine the empirical formula of a compound found to contain 63.50% silver, 8.25% nitrogen, and the remainder oxygen.?
• The percentage composition of acetic acid is found to be 39.9% carbon, 6.7% hydrogen, and 53.4% oxygen, how would you determine the empirical formula of acetic acid?
• Vitamin C has a empirical formula of C3H4O3 and a molecular mass of 176 amu, what is its molecular formula?
• How would you convert the empirical formula NO2 into the molecular formula, given the molar mass of this molecule is 92 g/mol?
• What is the empirical formula for nitroglycerin?
• What is the empirical formula of a compound that contains 40% carbon, 6.7% hydrogen, and 53.3% oxygen?
• Copper will react with sulfur to form a copper sulfide, if 1.500g copper reacts with sulfur to form 1.880g of copper sulfide, what is the empirical formula of the copper sulfide?
• How would you calculate the empirical formula of acetic acid (CH3COOH)?
• An organic compound is known to be composed of 46.60% carbon, 6.800% hydrogen, and 46.60% oxygen. What is its empirical formula?
• A compound containing only carbon and hydrogen is analyzed, and is found to contain 20.11% hydrogen on a mass basis. How can the empirical formula of the compound be calculated?
• A 11.04g sample of a hydrocarbon produces 34.71g of CO2 and 14.20g H2O. What is empirical formula of hydrocarbon?
• A certain ionic compound is found to contain .012 mol of sodium, .012 mol of sulfur, and .018 mol of oxygen. What is its empirical formula?
• How would you find the molecular formula from empirical formula?
• Why is the molecular formula of a compound more useful to a forensic scientist than an empirical formula?
• What is the difference between molecular formula and structural formula?
• Given the empirical formula NH2Cl and a molar mass of 51.5 g/mol, what is the molecular formula?
• How do you find the molecular formula of nicotine (CxHyNz), when 0.438 grams of nicotine burns to make 1.188 g CO2 and 0.341 g H2O? The molecular weight of the nicotine is 162.2g per mole.
• A certain sugar has a chemical composition of 40 % carbon, 6.6 % hydrogen, and 53.3 percent oxygen. The molar mass is 180 g/mol. What is the molecular formula?
• How would you calculate the molecular formula of a compound?
• How would you determine the molecular formula from the following empirical formula and molar mass: NPCl2, 348 g/mol?
• When 0.72 g of a liquid is vaporized at 110 C and 0.967 atm, the gas occupies a volume of 0.559 L. The empirical formula of the gas is CH2. What is the molecular formula of the gas? Please give easy to follow, step by step instruction and the answer.?
• How would you find the molecular formula for a compound with the empirical formula CH2O and the molar mass is 180.2 g/mol?
• Ribose is an important sugar in RNA, with a molar mass of 150.15 g/mol. If its empirical formula is CH2O, what is its molecular formula?
• How would you find the molecular formula for a compound with molar mass 180 amu, that is composed of 40% carbon 6,67% hydrogen 53.3 oxygen?
• How would you determine the molecular formula of `NPCl_2` (347.64 g/mol)?
• How would you determine the molecular formula of C4H9?
• Benzene and acetylene have the same empirical formula, CH. However, benzene has a molar mass of 78 g, and acetylene has a molar mass of 26 g, what are the molecular formulas of benzene and acetylene?
• A compound has the empirical formula of `"CH"_2"O"` and a molar mass of 60 g/mole. What is the molecular formula?
• Is the empirical formula for a compound ever the same as its molecular formula? .
• What is the molecular formula of sodium phosphate?
• What is the molecular formula of HCO2 with the molar mass of 90.0 g/mol?
• Given the molar mass of the compound is 186.5 g and the empirical formula is C2H7, what is its molecular formula?
• What is the molecular formula of ethanoic acid?
• What is the molecular formula of each compound CH2 with molar mass 42.08 g/mol?
• What is the molecular formula of dichloroacetic acid if the emperical formula is CHOCl and the gram molecular mass is 129.0 g?
• What is the molecular formula of a compound with the following percentages: 75.69% C, 8.80% H, and 15.51% O?
• A compound has a molar mass of 142.00g/mol and the percent composition is 50.7% Carbon, 4.2% Hydrogen and 45.1% Oxygen. What is the molecular formula?
• A compound with the empirical formula CH2 has a molar mass of 28 g/mol. What is the molecular formula for this compound?
• How would you determine the molecular formula of a substance that contains 92.3%C and 7.7%H by mass. This same substance when in the gas phase has a density of 0.00454g/ml at stp conditions?
• A compound has the empirical formula CHCl. A 256 mL flask, at 373 K and 750 torr, contains 0.800 g of the compound, what is the molecular formula?
• A compound with empirical formula CH was found by experiment to have a molar mass of approximately 91. What is the molecular formula of the compound?
• Is CO2 an empirical formula, a molecular formula, or both?
• What is the chemical formula for nitrogen?
• What is the chemical formula of C4H9 with a molar mass of 114.26 g/mol?
• What is the molecular formula of a substance that has an empirical formula of C2H5 and a molecular mass of 58 g/mole?
• 10.00mg of a substance yields 11.53mg H2O and 28.16mg CO2. What is the empirical formula of menthol? This is so confusing, help would be much appreciated!?
• A compound contains only `C`, `H`, and`N`. Combustion of `35.0` `mg` of the compound produces `33.5` `mg` `CO_2` and `41.1` `mg` `H_2O`. What is the empirical formula of the compound?
• Elemental analysis of a compound showed that it consisted of 81.82% carbon and 18.18% hydrogen by mass. How many hydrogen atoms appear in the empirical formula of the compound?
• A 0.3200 g sample of a carboxylic acid is burned in oxygen, producing 0.5706 g of CO2 and 0.2349 g of H2O. How would you determine the empirical formula of carboxylic acid?
• How would you determine the empirical and molecular formula for hydrogen peroxide, which is 5.94% H and 94.06% O and has a molar mass of 34.01 g/mol?
• A compound is 54.53% C, 9.15% H, and 36.32% O by mass. What is its empirical formula?
• What is the empirical formula and empirical formula mass for the following compound: C3H6O3?
• What is empirical formula for Chloroform (89.1% Chlorine, 0.84% Hydrogen, 10.06% Carbon)?
• Menthol is composed of C, H, and O. A 0.1005g sample of menthol is combusted, producing 0.2829g of CO2 and 0.1159g H2O. What is the empirical and molecular formula for menthol?
• How would you calculate the empirical formula of acetic acid (CH3COOH)?
• The mineral pyrolusite is a compound of manganese-55 and oxygen-16. If 63% of the mass of pyrolusite is due to manganese, what is the empirical formula of pyrolusite? a. MnO b. Mn2O c. Mn2O2 d. MnO2 e. none of these?
• How would you determine the empirical formula of a compound found to contain 52.11% carbon, 13.14% hydrogen, and 34.75% oxygen?
• A compound that contains only nitrogen and oxygen is 30.4% N by mass; the molar mass of the compound is 92 g/mol. What is the empirical formula and the molecular formula of the compound?
• A sample of a compound containing the elements silver, carbon, and oxygen, has a mass of `"1.372 g"`. What are the empirical and molecular formulas?
• Question #b5c9b
• A compound was found to contain `"39% K"`, `"27.9% Mn"`, and `"32.5% O"`. What is the empirical formula for this compound?
• A sample of a compound contains `"0.100 g H"` and `"4.20 g N"`. What is its empirical formula?
• A sample of sulfur having a mass of 1.28 g combines with oxygen to form a compound with a mass of 3.20g. What is the empirical formula of the compound?
• A sample of sulfur having a mass of `1.28` g combines with oxygen to form a compound with a mass `3.20` g. What is the empirical formula of the compound?
• Question #3015d
• What is the `"empirical formula"`?
• The analysis of a hydrocarbon revealed that it was 85.6281% C and 14.3719% H by mass. When 3.41 g of the gas was stored in a 1.4 L flask at -86.6273 C, it exerted a pressure of 505 Torr. What is the molecular formula of the hydrocarbon?
• Finding the empirical formula of iron oxide?
• Question #05543
• What is the empirical formula of the compound `C_6H_5(OH)_2`?
• Question #00913
• On combustion, 1.0 L of a gaseous compound of hydrogen, carbon, and nitrogen gives 2.0 L of `CO_2`, 3.5 L of `H_2O` vapor, and 0.50 L of `N_2` at STP. What is the empirical formula of the compound?
• A solution of 2.50 g of a compound having the empirical formula `C_6H_5P` in 25.0 g of benzene is observed to freeze at 4.3°C . What is the molar mass of the solute and its molecular formula?
• What is the empirical formula for a compound that contains 18.8% Li, 16.3% C, and 64.9% O?
• Question #b7b77
• What is the empirical formula of a compound of uranium and fluorine that is composed of 67.6% uranium and 32.4% fluorine?
• Suppose you know that a compound is 11.2% H and 88.8% O. What information do you need to determine the empirical formula?
• If 20.50g of Sn combine completely with 24.49g of Cl to form a compound, what is the percent composition of tin in the compound? What is the empirical formula of the compound?
• In the reaction between `HCl` and `Na_2CO_3`, what gas is formed?
• A compound is 92.3% carbon and 7.7% hydrogen. What is the empirical formula of this compound?
• What is the molecular formula of a compound that has a molecular mass of 42 and an empirical formula of `CH_2`?
• A compound contains 40% calcium, 12% carbon, and 48% oxygen by mass. What is the empirical formula of this compound?
• An unknown compound is analyzed and found to be composed of 14.79% nitrogen, 50.68% oxygen, and 34.53% zinc. What is the empirical formula for the compound?
• What is the empirical formula for a compound whose analysis is 74.97% aluminum and 25.03% carbon?
• An unknown compound is analyzed and found to be composed of 14.79% nitrogen, 50.68% oxygen, and 34.53% zinc. What is the empirical formula for the compound?
• Question #b183e
• A compound with an empirical formula of `C_4H_4O` and a molar mass of 136 grams per mole. What is the molecular formula of this compound?
• The molecular formula for vitamin C is `C_6H_8O_6`. What is the empirical formula?
• What is the empirical formula for a compound that is 31.9% potassium, 28.9% chlorine, and 39.2% oxygen?
• Question #c46be
• What is the empirical formula for a compound that consists of 72.2% magnesium and 27.8% nitrogen by mass?
• Formaldehyde consists of 40.0% carbon, 6.7% hydrogen, and 53.3% oxygen. What is its empirical formula?
• What is the molecular formula of a compound with a mass of 180 grams and an empirical formula of `CH_2O`?
• The empirical formula of butadiene is `C_2H_3`. An experimental determination of the molar mass of butadiene yields the value of 54 g/mol. What is the molecular formula of butadiene?
• An oxide of copper contains 2.118 g of copper and 0.2666 g of oxygen. Another oxide of copper contains the same mass of copper but 0.5332 g of copper. What are the empirical formulas of the oxides?
• Question #e2fb6
• A compound is found to be 40.0% carbon, 6.7% hydrogen and 53.5% oxygen. Its molecular mass is 60. g/mol. What is its molecular formula?
• What is the empirical formula of a substance that is 53.5% C, 15.5% H, and 31.19% N by weight?
• What is the mass of `7.9 * 10^23` of `O_2` at STP?
• Question #96443
• A nitrogen and oxygen containing molecule is decomposed into its elements. It is found to contain 14 g of nitrogen and 40 g of oxygen. What is the empirical formula of the compound?
• A compound is found to contain 1.32 moles of Li, 0.66 moles of Se, and 2.64 moles of O. What is the empirical formula of the compound?
• Question #77d3f
• What is the empirical formula of potassium chloride?
• A compound is found to contain 53.70% iron and 46.30% sulfur. What is its empirical formula?
• Tooth enamel, or hydroxyapatite, has a molar mass of 422 g/mol. Its composition is 28.5% calcium 22% phosphorus, 49.3% oxygen, and 0.2% hydrogen. What is the molecular formula?
• The neurotransmitter norepinephrine is 56.8% carbon, 6.5% hydrogen, 28.4% oxygen, and 8.3% nitrogen. Its molar mass is 169 g/mol. What is the molecular formula of this substance?
• 24.2538 grams of an unknown compound was found to contain 50.15% sulfur and 49.85% oxygen. What is the empirical formula?
• What is the molecular formula of a compound with a molar mass of 180.2 grams/mole and the empirical formula `CH_2O`?
• What is the formula weight of the compound `Ba_3(PO_4)_2`?
• What is the empirical formula for the compound which is comprised of 2.677 g Ba and 3.115 g Br?
• The empirical formula is `C_5H_4` and its molar mass is 128.16 g/mol. What is the molecular formula?
• A component of protein called serine has an approximate molar mass of 100 g/mole. If the percent composition is as follows, what is the empirical and molecular formula of serine?
• What is the molar mass of `P_4O_10`?
• What is the molar mass of `C_6H_6`?
• A 5.325 g sample of methyl benzoate, a compound in perfumes, was found to contain 3.758 g of carbon, 0.316 g of hydrogen, and 1.251 g of oxygen. What is the empirical formula? If its molar mass is about 136 g/mol, what is its molecular formula?
• When `"0.1 mols"` of an unknown hydrocarbon `"C"_x"H"_y` was combusted, it produced `"0.3 mols"` of `"CO"_2` and `"0.4 mols"` of `"H"_2"O"`. What is the molecular formula of this hydrocarbon?
• What would be the empirical formula of a hypothetical compound that contains 60% by mass of element A (`A_(r1) = 10`) and 40% by mass of element B (`A_(r2) =20`)?
• A compound has an empirical formula of `HCO_2` and a molecular mass of 90 grams per mole. What is the molecular formula of this compound?
• A 175.0 g sample of a compound contains 56.15 g `C`, 9.43 g `H3, 74.81 g`O`, 13.11 g`N`, and 21.49 g`Na.# What is its empirical formula?
• A compound has a molecular mass of 54 and an empirical formula of `C_2H_3`. What is the molecular formula of the compound?
• What is the empirical formula of a compound that has a carbon-to-hydrogen ratio of 2 to 6?
• What is the empirical formula of a compound with the molecular formula `N_2O_4`?
• What is empirical formula of a compound which consists of 89.14% Au and 10.80% of O?
• The molar mass of a compound is 88 g/mol. It contains 54.53% carbon, 9.15% hydrogen and 36.32% oxygen. What is the molecular formula of the compound?
• What is the empirical formula for a compound that is 60.9% arsenic and 39.1% sulfur?
• What is the empirical formula of a following compound if a sample contain 0.0130 mol `C`, 0.0390 mol `H`, and 0.0065 mol `O`?
• What is the empirical formula of a compound composed of 3.25% hydrogen (H), 19.36% carbon (C), and 77.39% oxygen (O) by mass?
• Question #5e085
• What bonding occurs in `"ethylene glycol"`?
• What is the difference between the `"molecular and empirical formulae?"`
• Question #a0f3f
• What is the empirical formula of a molecule containing 24% carbon, 6% hydrogen, and 70% chlorine?
• What is the empirical formula of a compound containing 83% potassium and 17% oxygen?
• Question #a782a
• A sample of a compound contains 7.89 g potassium, 2.42 g carbon, and 9.69 g oxygen. What is the empirical and molecular formulas of this compound, which has a molar mass of 198.22 g/mol?
• A 45.8 mg sample of silicon reacts with hydrogen to form 50.7 mg of the compound. What is the empirical formula of the silicon hydride?
• Question #7c4d8
• Question #f5bf1
• Question #91cfd
• What is the molecular formula of a compound that has 44.44% carbon, 3.73% hydrogen, and 51.83% nitrogen?
• What is the molecular formula of a compound that is 62.58% carbon, 9.63% hydrogen, 27.79% oxygen?
• What is the empirical chemical formula of a compound that has has mass percent 62.1% carbon, 10.5% hydrogen, and 27.4% oxygen?
• What is the empirical chemical formula of a compound that is 69.9% of iron and 30.0% oxygen?
• Question #8adc6
• What is the empirical formula of a compound composed of 43.64% P and 56.36% O by mass?
• A sample of compound containing C, O, and silver (Ag) weighed 1.372 g. On analysis it was found to contain 0.288 g O and 0.974 g Ag. The molar mass of the compound is 303.8 g/ mol. What is the empirical and molecular formula of the compound?
• Why is the empirical formula important?
• How is the empirical formula used?
• What is empirical formula mass?
• How do you write the empirical formula?
• How do you solve an empirical formula?
• How do you determine an empirical formula?
• How can an empirical formula be interpreted?
• How can empirical and molecular formulas be the same?
• How can the empirical formula of a compound be experimentally found?
• How can you calculate an empirical formula?
• How do you calculate empirical formula of a compound?
• How does empirical formula differ from molecular?
• How do you find an empirical formula from mass percent?
• How do you calculate an empirical formula from percent composition?
• How do you calculate empirical formula of a combustion?
• How do you calculate the empirical formula of a hydrocarbon?
• How do you calculate the empirical formula of phosgenite?
• How do you solve empirical formula calculations?
• What does an empirical formula determine?
• What is the empirical formula for `C_6H_6`?
• Question #a1555
• A compound's empirical formula is `C_2H_5`. If the formula mass is 116 amu, what is the molecular formula?
• The molecular formula for phtalic acid is is `C_8H_6O_4`. What is the empirical formula?
• A sample of an iron sulfide contains `2.561*g` of metal, and `2.206*g` of sulfur. What is the empirical formula of iron sulfide?
• Question #46fd3
• Question #f0d05
• A compound is found to contain 23.3% magnesium, 30.7% sulfur, and 46.0% oxygen. What is the empirical formula of this compound?
• What is the empirical formula of a compound containing 60.0 g sulfur and 90.0 g oxygen?
• What is the empirical formula for a compound containing 26.57 g potassium, 35.36 g chromium, and 38.07 g oxygen?
• What is the empirical formula for a compound containing 38.8 g carbon, 16.2 g hydrogen and 45.1 g nitrogen?
• Question #ed628
• Isooctane has the molecular formula `C_8H_18`. What is its empirical formula?
• The empirical formula of a compound is `CH`. If the molar mass of this compound is about 78 g, what is its molecular formula?
• What does the empirical formula of a compound describe?
• What is the molecular formula of a compound with the empirical formula `CH` and a molar mass of 39.01 grams per mole?
• What is the empirical formula of a compound that contains 50.0% carbon, 6.7% hydrogen, and 43.3% oxygen by mass?
• Assume that 7.35 g of Cr reacts with oxygen to form 10.74 g of metal oxide. What's the empirical formula for the compound?
• How can I determine the van't Hoff factor of a substance from its formula?
• A compound is found be 36.5% `Na`, 25.3% `S`, and 38.0% `O`. What is its empirical formula?
• What is the empirical formula of a compound that contains 75.7% arsenic and 24.3% oxygen?
• An unknown sample with a molecular mass of 180.0g is analyzed to yield 40% C, 6.7% H, and 53.3% O. What is the empirical formula and the molecular formula of this compound?
• How do you calculate the empirical formula of a compound formed from 3% `C`, 0.3% `H`, and 96.7% `I`?
• A compound formed of 0.059 mol hydrogen and 0.94 mol oxygen has a molecular mass of 34.0 g/mole. What is the molecular formula of this compound?
• Styrene has the empirical formula `CH`. It has a molar mass of 104 g. What is the multiplier to get the molecular formula?
• What is the molecular formula of a compound if its empirical formula is `CFBrO` and its molar mass is 381.01 g/mol?
• What is the empirical formula of a compound that contains 43.38% sodium, 11.33% carbon, and 45.29% oxygen?
• What is the molecular formula of a compound if its empirical formula is `NO_2` and its molar mass is 138.02 g/mole?
• What is the empirical formula of a phosphoric acid that contains 0.3086 g of hydrogen, 3.161 g of phosphorus, and 6.531 g of oxygen?
• What is the empirical formula of an unknown compound that contains 60.3% of magnesium and 39.7% of oxygen?
• What is the major constituent of smog?
• You have a compound that is composed of 62.0 grams `C`, 12.15 grams `H`, 13.771 grams `O` and 12.059 grams `N`. What is its empirical formula?
• A compound contains 69.94 percent iron and 30.06 percent oxygen. What is its molecular formula if the molar mass of the compound is 199.55 per mole?
• What is the empirical formula of a compound that contains 32.39 percent sodium, 22.53 percent sulfur, and 45.07 percent oxygen?
• What is the formula of alumina?
• Question #ce7a4
• A substance contains 36.1 percent calcium and 63.9 percent chlorine by weight. What is the empirical formula of the given compound?
• An hydrocarbon is `92.3%` with respect to carbon. What is its empirical formula? And if the mass of the molecule is `26*g*mol^-1`, what is its molecular formula?
• What is the empirical formula for fructose given its percent composition: 40.00% `C`, 6.72% `H`, and 53.29% `O`?
• What is the empirical formula for a compound that is found to contain 10.15 mg `P` and 34.85 mg `Cl`?
• If 0.225 mol of tin combines with 0.450 mol of sulfur, what is the empirical formula of the tin sulfide product?
• Question #e7e77
• A compound is composed of 85.64% carbon and 14.36% hydrogen. The compound has a formula mass of 42.08 grams. What is the molecular formula?
• What is the molecular formula if the empirical formula is `C_3H_7`, and the experimental molar mass is 86 g/mole?
• A substance has a molecular formula of `C_8H_10N_4O_2`. What is the empirical formula?
• How many molecules in a given volume of fluid?
• Question #0ebb5
• A copper salt contains `25.5%` `Cu`, `12.9%` `S`, `25.6%` `O`, and `36.0%` `"water"`...what is the empirical formula of the hydrate?
• What is the empirical formula for the compound that has 46 grams of sodium, 64 grams of sulfur, and 48 grams of oxygen?
• Question #8da8d
• Question #25b38
• What is the empirical formula of a compound made up of 80% oxygen and 20% hydrogen?
• What is the empirical formula of a substance with 74.0% C , 8.65% H, and 17.4% N?
• What is the empirical formula of a substance with 1.587 g arsenic and 3.755 g of chlorine?
• A compound having an empirical formula of `C_3H_4O_3` has a mass of 180 g/mol. What is the molecular formula?
• Question #87cb7
• Question #b85e8
• Acetic acid has 2 carbon, 4 hydrogen, and 2 oxygen atoms per molecule. What is the empirical formula for acetic acid?
• ( In a tube ) why CO2 gas doesn't sinks (gets below) , displacing the water to be on the top, If carbon dioxide (44 g/mol) has more molar mass than water( 17 g/mol)? Is it just because water is a liquid and co2 is a gas or there are some other factors?
• Question #2b431
• Can empirical and molecular formulas be used to describe ionic concepts?
• How are empirical and molecular formulas alike?
• How are empirical and molecular formulas for a compound related?
• How are empirical and molecular formulas related?
• How can empirical and molecular formulas be the same?
• How do you determine the empirical and molecular formulas?
• How do you find empirical and molecular formulas?
• Can empirical and molecular formulas be the same?
• How do you determine empirical and molecular formulas of a compound?
• How do you determine empirical and molecular formulas from percent composition?
• How can you find empirical and molecular formulas of benzene?
• How do you solve empirical and molecular formulas?
• Are empirical and molecular formulas the same?
• What are the empirical and molecular formulas for nitrogen oxide?
• What are the empirical and molecular formulas of benzene?
• What are the empirical and molecular formulas of maleic acid?
• What are the empirical and molecular formulas of nicotine?
• What are empirical and molecular formulas?
• What is the empirical and molecular formula for ibuprofen?
• Molar mass of substance A in material Eu(A)3 is 238g/mol. 0.476g of substance A was burned and produced 1.408g of CO2 and 0.252g of H2O. Substance A is made up of carbon, hydrogen and oxygen. What is the chemical formula for substance A?
• How do you determine an empirical formula?
• How do you find an empirical formula?
• What is an empirical formula?
• How is mass determined from an empirical formula?
• Why do empirical formulas exist?
• Explain what is meant by empirical formula?
• How can an empirical formula be interpreted?
• How can you calculate empirical formulas?
• How can the empirical formula of a compound be found?
• A sample of a white solid contains 0.212 g of magnesium and 0.140 g oxygen. What is the empirical formula of this compound?
• Question #1c929
• What is the empirical formula of `C_8H_10`?
• What is the empirical formula of `C_4H_8O_2`?
• What is the empirical formula of `P_4O_10`?
• What is the empirical formula of `C_6H_4Cl_2`?
• What is the empirical formula of `B_3N_3H_6`?
• What are the empirical formula and empirical formula mass for `C_8H_24 0_8`?
• Vanillin, a flavoring agent, is made up of carbon, hydrogen, and oxygen atoms. When a sample of vanillin weighting 2.500 g burns in pure oxygen, 5.79 g of `CO_2` and 1.18 g of water are obtained. How would you calculate the empirical formula of vanillin?
• Arsenic reacts with chlorine to form a chloride. If 1.587 g of arsenic reacts with 3.755 g of chlorine what is the empirical formula of the chloride?
• An unknown compound has the formula `C_xH_yO_z`. You burn 0.1523 g of the compound and isolate 0.3718 g of `CO_2` and 0.1522 g of `H_2O`. What is the empirical formula of the compound?
• If 1.000g of tin metal reacts with 0.640g of fluorine gas, what is the empirical formula of the product?
• A 4.08 g sample of a compound of nitrogen and oxygen contains 3.02 g of oxygen. What is the empirical formula?
• What is the empirical formula of a compound that is composed of 1.67 g of cerium and 4.54 g of iodine?
• What is the empirical formula for the compound containing 13.5 g Ca, 10.8 g O, and 0.675 g H?
• What is the empirical formula for the compound consisting of 63% manganese and 37% oxygen by mass?
• What is the empirical formula of a compound?
• What is the empirical formula for the compound that is made of 1.85 moles of nitrogen and 4.63 moles of oxygen?
• A substance consisting only of Na, B and H is 60.80% Na and 28.60% B. What is the empirical formula of the substance?
• Question #6d344
• If something is made of 1.05 g `"Ni"` and 0.58 g `"O"`, what is the empirical formula?
• Question #42449
• Question #eb15a
• A hydrated compound has an analysis of 18.29% Ca, 32.37% Cl, and 49.34% water. What is its formula?
• Question #8971d
• What is the `"empirical formula"`, and how does it relate to the `"molecular formula"`?
• A hydrocarbon gas with an empirical formula `CH_2` has a density of 1.88 grams per liter at 0°C and 1.00 atmosphere. What is a possible formula for the hydrocarbon?
• Menthol, the substance we can smell in mentholated cough drops, is composed of C, H, and O. A 0.1005 g sample of menthol is combusted, producing 0.2829 g of carbon dioxide and 0.1159 g of water. What is the empirical formula for menthol?
• How can I determine the empirical formula from percent composition?
• What is the empirical formula of a compound that contains 53.73% Fe and 46.27% of S?
• What is the empirical formula of a compound containing `C, H`, and `O` if combustion of 3.69 g of the compound yields 5.40 g of `CO_2` and 2.22 g of `H_2O`?
• A compound is 53.31% C, 11.18% H, and 35.51% O by mass. What is its empirical formula?
• Burning then sample of an organic compound with the weight of 0.00480 g it is afforded: 0.00703 g of the CO2 and 0.00283 g of the H2O, Determine the empirical formula of the compound which consists of hydrogen, carbon and oxygen?
• How to determine the molecular formula of this organic compound?
• PH Question?
• A compound contains 63g Mn and 37g O, what is the empirical formula?
• What is the empirical formula of something that is made of 31g of phosphorous and 35g of Cl?
• Question #184ab
• A `22.35*g` mass of an unknown compound consisting of potassium, chlorine, and oxygen, contained `7.13*g` of potassium, `6.47*g` of chlorine. What is its empirical formula?
• Determine the molecular formula of a hydrocarbon if the combustion of 5.3 mg obtained 16.6 mg `"CO"_2`. The density of the gas at standard conditions is `"2.504 g/dm"^3`. What is the molar mass of the gas and its molecular and empirical formula?
• Combustion data of an organic compound yielded `74.0%, C;` `7.4%, H;` `8.6%, N;` and the balance oxygen. What is the empirical formula?
• Hydrocarbon contains 18.18% hydrogen and 81.82% carbon. One litre of this gas has the same mass as carbon dioxide. What is the molecular formula of this hydrocarbon?
• How do you determine the empirical formula of a compound that has the following composition: 92.3 percent C and 7.7 percent H?
• Hydrogen peroxide has the empirical formula HO and an empirical formula weight of 17.0 amu. If the molecular weight is 34.0 amu, what is the molecular formula?
• When 1.50 g of copper is heated in air, it reacts with oxygen to achieve a final mass of 2.14 g. How do you calculate the empirical formula of this copper oxide?
• What critical piece of information must be known (or given in the problem) in order to determine the molecular formula for a compound from its empirical compound?
• Why are the subscripts in a chemical formula whole numbers (for example, `N_2O_5` instead of `NO_2.5`)?
• Is the empirical formula for a compound ever the same as its molecular formula? Why or why not?
• Question #910ee
• Question #87de9
• Question #ef835
• A blue solid is 36.84% nitrogen and the rest is oxygen. What is the empirical formula of the solid?
• Nicotine, a component of tobacco, is composed of C, H, and N. A 3.150-mg sample of nicotine was combusted, producing 8.545 mg of co and 2.450 mg of H20. what is the empirical formula for nicotine?
• Question #a7489
• Question #c4c4e
• Question #a4626
• Serotonin (molar mass 176 g/mol) is a compound that conducts nerve impulses in brain and muscle. It contains 68.2% C, 6.86% H, 15.9% N and 9.08% O. What is the molecular formula?
• Question #ce300
• Question #631d5
• How do you write the formula for potassium metal?
• Question #4f14c
• Question #c438f
• Analysis of a compound shows that it contains 7.0 g nitrogen and 16.0 g oxygen. What is its empirical formula?
• How many atoms of oxygen are in one MOLE of `Al_2(CrO_4)_3 8H_2O`?
• What are the concentrations (ω) of carbon, hydrogen and chlorine in chlorineciklohexane?
• Question #0c5e8
• What is the empirical formula of methane given methane can be decomposed into 4.5 g of carbon and 1.5 g of hydrogen?
• A hydrocarbon contains a benzene ring. It is made up of 91.43% carbon and its molar mass is about 105g/mol. What is the molecular formula of this hydrocarbon?
• What is the formula for barium fluoride?
• . The mineral manganosite is a compound of manganese-55 and oxygen-16. If 77% of the mass of manganosite is due to manganese, what is the empirical formula of manganosite?
• What is the empirical formula for perfluoropropane if the compound contains 81% fluorine and 19% carbon by mass?
• Question #1cd3e
• What are the empirical formulas for: calcium chloride, potassium oxide, magnesium sulfide, magnesium chloride, lithium fluoride, lithium oxide, sodium sulfide?
• A compounds empirical formula is HO. If the formula mass is 34 amu, what is the molecular formula?
• What is the empirical formula for a compound that is 36.1% Ca and 63.9% CI?
• A student found that 1.19 g of chromium (`Cr`) formed 1.74 g f chromium oxide. The molar mass of `Cr` is 52.00 g/mol. What is the empirical formula of chromium oxide?
• How does `"propionaldehyde"` differ from `"acetone"`?
• A 10 g sample of a compound contains 4.00g `C`, 0.667g `H`, and 5.33g `O`. What is the molecular formula?
• The empirical formula of a compound is determined to be `"C"_2"H"_3`, and its molecular mass is found to be 54.10 g/mol. How do you determine the molecular formula of the compound?
• How might the mass of copper product be affected by the following? Clearly explain the effect that each of these situations would have on the mass of the product.
• What is molecular formula of compound that weighs 46 g/mol and analyzes to 52.2% C, 34.8% O, and 13% H?
• In the Chemical formula `CO_2`, what does the subscript 2 represent?
• What is the empirical formula of the unknown compound?
• Do ionic compounds have only empirical formulas?
• How do you convert 0.45 g of sodium hydroxide, NaOH to moles?
• If 4.0 moles of a gas at a pressure of 5.4 atmospheres have a volume of 120 liters, what is the temperature?
• How do we calculate percentage composition and empirical formulae?
• Question #a5582
• A compound was found to have 85.7% carbon and 14.3% hydrogen. Its molecular mass is 84. What is its empirical formula? What is its molecular formula?
• What is the formula for magnesium carbonate?
• The mineral greenockite is a yellow sulfide of cadmium that is 78.0% cadmium and 22.0% sulfur. How do you determine the empirical formula of greenockite?
• A sample of a compound weighs 200 grams and contains only carbon, hydrogen, oxygen, and nitrogen. By analysis, it contains 97.56 grams of carbon, 52.03 g of oxygen and the rest is nitrogen. How do you its empirical formula?
• The atomic number of sulfur is 16. Sulfur combines with hydrogen by covalent bonding to form a compound, hydrogen sulfide. Based on the number of valence electrons in a sulfur atom, how do you predict the molecular formula of the compound?
• What is the formula for dihydrogen monoxide?
• What is the empirical formula for a compound which contains 67.1% zinc and the rest is oxygen?
• What is the empirical formula of a compound that contains 25.92 percent nitrogen and 74.07 percent oxygen?
• Ibuprofen, a common pain remedy, has an empirical formula of `C_7H_9O` and a molar mass of approximately 218.078 grams per mole. What is the molecular formula of ibuprofen?
• A hydrocarbon is composed of 85.57% carbon and 14.43% hydrogen and a molar mass of 28.06 mol. What is the molecular formula?
• Question #05d76
• Microanalytical data give `C, H, N: 65.73%; 15.06%; 19.21%`. What is the molecular formula if the `"vapour density=37"`?
• What is meant by the term empirical formula?
• An organic compound containing 78.5% carbon, 13.1% nitrogen, 8.4% hydrogen. If the molar mass of the compound is 107 g/mol, what is the empirical and molecular formulas?
• Chemical analysis shows that citric acid contains 37.51% C, 4.20% H, and 58.29% O. What is the empirical formula for citric acid?
• 4.6g of an organic gaseous compound was burned. Its gas density compared to air is 23. After burning this compound, 4.48 L of CO2 (at 0 °C and 1 atm) and 5.4 g of H2O were produced. What is the name and chemical formula of this organic compound?
• How do you get the percentage composition of ibuprofen with respect to `C,H,N.O`?
• The empirical formula of a compound is CH. The experimental molar mass is 78.12 g/mol. How do you determine the molecular formula of the compound?
• What would be considered the molecular formula for the compound that has an empirical formula of `CH_4` but a molar mass of 80 g/mol?
• In an experiment, a 2.514 g sample of calcium is heated in oxygen and the compound formed has a mass of 3.518 g. What is the empirical formula for the compound?
• What is the empirical formula for the following compounds?
• Does a molecular formula shows the arrangement of the atoms in a molecule?
• Question #15384
• Question #c839f
• What is an empirical formula?
• What is the empirical formula for a compound that is 33.36% calcium, 26.69% sulfur, and 40.00% oxygen?
• Question #193f6
• What is the empirical formula of an aluminum fluoride that is `32%` by mass with respect to the metal?
• Question #4b3f0
• What is the empirical formula of glucose?
• Question #29ef3
• Question #1827a
• An organic compound contains `45.90%` `C`; `2.75%` `H`; `7.65%` `N`; `17.50%` `S`; and the balance oxygen. What is the empirical formula of the compound?
• A hydrogen atom is 84% carbon, by mass. Its relative molecular mass is 100. What is it's empirical formula?
• Question #79408
• Combustion of a 0.9827 g sample of a compound containing only carbon, hydrogen, and oxygen produced 1.900 g of `CO_2` and 1.070 g of `H_2O`. What is the empirical formula of the compound?
• How do you find the empirical formulas for 65.2% Sc, 34.8% O?
• Question #61897
• Is `K_2O` an empirical formula?
• Is `CaCl_2` an empirical formula? Why or why not?
• Question #56968
• A sample of a compound contains 259.2 g `F` and 40.8 g `C`. How do you find its empirical formula?
• What is the molecular formula for the following molecule?
• What is the formula for both oxides of tin?
• An organic compound contains 20.0 % Carbon, 6.66% Hydrogen, 47.33% Nitrogen and the rest was Oxygen. Its molar mass is 60 gm. The molecular formula of the compound is? (A) `CH_4 N_2 O` (B) `CH_2 NO_2` (C) `C_2H_6 NO` (D) `CH_18 NO`
• What is the empirical formula of propene? Of polypropene?
• Why is the ratio of the mass of carbon to the mass of hydrogen `3:1` with respect to methane?
• Question #c8eb4
• `HO` and `H_2O_2` are examples of the empirical and molecular formula of a compound, respectively. What is the relationship between these two types of formulas?
• Question #96a4f
• How do we find percentage composition of a compound?
• What is the empirical formula of a barium salt that contains `17.14*g` of the metal, and `8.86*g` of chlorine?
• Question #0dfbd
• Question #bf587
• What is the maximum amount in moles of `P_2O_5` that can theoretically be made from 186 g of `P_4` and excess oxygen?
• Question #c2dd9
• Combustion of a `20*g` mass of compound gives `44*g` `CO_2`, and `7.99*g` of water. Given that the molecular mass is `180*g*mol^-1` what are the empirical and molecular formulae?
• Question #589aa
• Question #0b136
• An unknown compound was found to have a percent composition as follows: 47.0% potassium, 14.5% carbon, and 38.5% oxygen. What is empirical formula? If the true molar mass of the compound is 166.22 g/mol, what is its molecular formula?
• For a compound NaAc, the percent composition is that: 29.28% C, 3.68% H, 39.01% O, and 28.03% Na. What is the empirical formula of this compound?
• A compound with a molar mass of 180 g is made of carbon, hydrogen and oxygen. When it is burned, the products are 44.0 g of `CO_2`, and 8 g of `H_2O`. Based on this, what are the empirical formula and the molecular formula of the compound?
• A chromium chloride salt contains `32.8%` metal content by mass. What is its empirical formula?
• An oxide of chromium is found to have the following composition: 28.2% Cr and 71.8% O. How would you determine this compound's empirical formula?
• What is the empirical formula of a compound if it has 80g Ca and 70g Cl?
• How do you write the formula for chromium (III) sulfide?
• How do you calculate the molecular formula of a compound with the empirical formula `C_n H_(2n) O` and a molar mass of 150 g/mol?
• What is the empirical formula? Can I just guess it?
• Question #ed77e
• Question #8d963
• Question #6bd7c
• Question #8cd77
• A `10.5*g` mass of a hydrocarbon contains `1.5*g` of hydrogen. If the molecular mass of the hydrocarbon in `210*g*mol^-1`, what are the empirical and molecular formulae of the hydrocarbon?
• Question #cb68a
• Question #9b322
• A compound is found to be 12.7% carbon, 3.2% hydrogen, and 84.1% bromine. What is its empirical formula?
• A is found to be 12.7% carbon, 3.2% hydrogen, and 84.1% bromine What is its compound empirical formula?
• Ibuprofen has the following mass percent composition. What is the empirical formula of ibuprofen?
• What is the molecular formula of hydrochloric acid?
• What is the empirical formula of a hydride prepared from `4*g` of hydrogen, and `28*g` of oxygen?
• Chlorine reacts with hot sodium hydroxide solution. A sample of a compound formed in the reaction was found to contain 10.8 g of sodium atoms, 16.7 g of chlorine atoms and 22.5 g of oxygen atoms. What is the empirical formula of the compound formed?
• A salt is analyzed and found to contain `0.92*g` of sodium, `1.42*g` of chlorine, and `2.56*g` of oxygen. What is the empirical formula of this salt?
• A certain manganese oxide contains 72% manganese. What is the empirical formula?
• What is the molecular formula for the compound that is made up of 30.45 g N and 69.55 g O, and has a formula mass of 92.02 amu?
• Given a `"molecular formula"` of `C_4H_8O_2`, what is the `"empirical formula"`?
• What is the molecular formula of a compound with an empirical formula of `C_4H_9` and a gram-formula mass of 114.0 g/mole?
• What is the molecular formula of a material with percentage composition `C:40.5%`, `H:6.67%`, `O:53.33%`, and molecular mass of `180.0*g*mol^-1`?
• A salt contains `31.84%` potassium, `28.98%` chlorine, and `39.18%` oxygen by mass. What is its empirical formula?
• Question #b91d0
• What is the molecular formula of a material for which complete combustion of a unknown mass gives `3.38*g` of `CO_2(g)`, and `0.69*g` of water. An `11.6*g` mass of this gas gives a volume of `10.0*L` at `0` `""^@C` of `10*L`?
• What is the number of oxygen atoms in `Al_2(SO_4)_3`?
• What does `CuSO_4` stand for?
• Question #84d78
• Question #2c86e
• If the `"empirical formula"` is `CH`, and the molecular mass is `26*g*mol^-1`, what is the `"molecular formula"`?
• What is the molecular formula of a compound that has a molecular mass of 54 and the empirical formula `C_2H_3`?
• Question #abc31
• Cobalt, a transition metal, can have an oxidation number of either 2+ or 3+. What are the two possible chemical formula for the chemical combination of cobalt with oxygen?
• Question #5830d
• What is the molecular formula of a substance that decomposes into 133 g of H and 21.3 g of O, and was found to have a molar mass of 34.1 g?
• What is the molecular formula of a substance that decomposes into `1.33` `g` of `H` and `21.3` `g` of `O`, and was found to have a molar mass of `34.1` `gmol^-1`?
• The ratio of carbon atoms to hydrogen atoms to oxygen atoms in a molecule of dicyclohexyl maleate is 4 to 6 to 1. What is its molecular formula if its molar mass is 280 g?
• How does iron react with oxygen?
• What is the empirical formula for the compound `C_6H_12O_6`?
• Question #06412
• What is the molecular formula of the `C_3H_5O_2`, if the gram molecular mass is 146 g/mol?
• How can you determine if the molecular formula of a compound is the same as its empirical formula?
• How can you determine if the molecular formula a compound is the same as its of empirical formula?
• Question #4bc39
• A 170.00 g sample of an unidentified compound contains 29.84 g sodium, 67.49 chromium, and 72.67 g oxygen. What is the compound's empirical formula?
• Question #9b57f
• What is the molecular formula of a compound that has a molecular mass of 54 and the empirical formula C2H3?
• Find the molecular and empirical formula from the given information below?
• 2.00 grams of a straight-chained hydrocarbon contains 1.68grams of carbon, the rest hydrogen. 1. Calculate the empirical formula of this hydrocarbon.?
• What is the empirical formula of a compound that contains 30.4% nitrogen and 69.6% oxygen by mass?
• Question #5ce05
• Question #a7eaa
• Question #9bb2b
• Question #e67fa
• How do you determine if a formula is not molecular?
• Question #d3fd1
• Question #34aeb
• A 10.000g sample of a compound of nitrogen and oxygen contains 3.686 g of nitrogen. What is the empirical formula? I'm unsure if it is N2O.
• Question #d7129
• Question #f228f
• Question #fbbce
• Question #425a5
• Another compound found on Mars contains iron and oxygen. The compound contains 70% by mass of iron and 30% by mass of oxygen. How do you calculate the empirical formula of this compound?
• Question #e2fd1
• Question #31a4e
• Question #0ccb5
• Question #932c3
• `Na_3N` decomposes to form sodium and nitrogen gas at STP. If 13.7 L of nitrogen is produced, how many moles of `Na_3N` was used (22.4 L = 1 mole of any gas) ?
• What is the empirical formula for a compound which contains 0.0134 g of iron, 0.00769 g of sulfur and 0.0115 g of oxygen?
• A compound is found to consist of 63% manganese and 37% oxygen by mass. What is the empirical formula?
• Question #4dd91
• When we are given an empirical formula, why are we NOT quoted oxygen percentage?
• What is the empirical formula of a species that is `7.19%` by mass with respect to phosphorus, and `92.81%` by mass with respect to bromine? What is the molecular formula is the molecular mass is `431*g*mol^-1`?
• Question #33b75
• What is vinegar?
• Question #2612f
• Question #fb2b9
• In what form is the sulfur that we use in the laboratory?
• A hydrocarbon is `83.33%` by mass with respect to carbon. What is (i) its empirical formula, and (ii) its molecular formula if the hydrocarbon has a mass of `72*g*mol^-1`?
• How many atoms are there in 0.45 mol of aluminium?
• A hydrocarbon has `80%` carbon content. What is its empirical formula?
• Question #0557d
• Naphthalene (moth balls) contains 93.71% carbon and 6.29% hydrogen. Its molecular mass is 128 g mol-1, calculate its molecular formula?
• A 0.0245 mg sample of nitrogen reacts with oxygen to form 0.0945 mg of the oxide. What is the empirical formula of this nitrogen oxide compound?
• Question #39025
• An organic compound has the following percentage composition C = 12.36%, H = 2.13%, Br = 85%. Its vapour density is 94. what is its molecular formula?
• Combustion analysis of a 12.01 g sample of tartaric acts - which contains only carbon, hydrogen, and oxygen - produced 14.08 g CO2 and 4.32 g H2O. What is the empirical formula for tartaric acid?
• Help with question 11 c guys ?
• Given combustion data, how would we find the empirical formula of `C_7H_5N_3O_6`?
• Question #be093
• Question #819a0
• A sample of a compound containing only carbon and hydrogen is burned, producing 157 mg CO2 and 42.8 mg H2O. What is the empirical formula?
• What compound is formed by two elements which have `Z=12`, and `Z=9` respectively?
• An organic compound has a percentage composition of `40.1%` `C`, and `6.6%` `H`. What is its probable empirical formula?
• Microanalysis of an organic compound containing carbon, hydrogen, and oxygen, gives `62.6%*C`, and `4.21%*H`. What is the empirical formula of the compound?
• )A compound that contains just C, H and N is burned in oxygen. When 5.000 g of the compound is burned in excess oxygen, 6.019 g of `CO_2`, 4.313 g of `H_2O`, and 9.438g of `NO_2` are the only products. What is the empirical formula of the compound?
• A hydrocarbon has an empirical formula of `CH_2`, and a molecular mass of `42*g*mol^-1`. What is the hydrocarbon?
• An organic sample has composition by mass, `C:53.31%;H:11.18%;`, and the balance was oxygen. What is its empirical formula?
• What is the empirical formula of a oxide of cobalt that contains a `1.216*g` mass of metal, and a `0.495*g` mass of oxygen?
• Why is the empirical formula and chemical formula of `"C"_12"H"_22"O"_11` the same?
• Question #88388
• How many oxygen molecules are in 3.36 g of oxygen?
• Question #723ce
• How many atoms of oxygen are in one formula unit of `Ca(NO_3)_2`?
• Question #b369f
• Question #e7817
• Question #cb91b
• Question #97e4c
• Question #bed32
• Question #e42f1
• Find the molecular formula of an acid with a molar mass of 98 grams per moles and the percentage composition of the elements in the acid is as such: hydrogen=2%, sulphur=33%, oxygen=65% ?