Answers created by Andy Wolff

• Back to user's profile
• How do you balance `Co(OH)_3 + HNO_3 -> Co(NO_3)_3 + H_2O`?
  
• What do carbocations usually do?
  
• What is the structure of an organic species that has a formula of `C_9H_18` in which ALL the hydrogens are equivalent?
  
• Question #5621e
  
• Question #76042
  
• What is the relationship between atomic mass and mass number?
  
• Why is 1,4-dichloroanthracene polar?
  
• Neon has 10 protons and 10 electrons. How many additional electrons would it take to fill the outer (second) electron shell?
  
• Question #c1228
  
• What type of orbital is used with electrons in an orbital with `l = 3`?
  
• A sample of a gas having a volume of 1 L at 25 deg C and 1 atm pressure is subjected to a decrease in volume and an increase in temperature. What happens to the pressure of the gas?
  
• What is the oxidation number of the `Mn` in `KMnO_4`?
  
• A `5 L` container holds `5` mol and `6` mol of gasses A and B, respectively. Every three of molecules of gas B bind to two molecule of gas A and the reaction changes the temperature from `360^oK` to `210 ^oK`. By how much does the pressure change?
  
• If a Tadalafil 10 mg/tab has a typical half life of 17.5 hours, how long will it take until the blood concentration of this dosage falls to 25% of its initial strength?
  
• How do you write positron decay?
  
• Suppose light travels 1.5 times faster in a vacuum than it does in glass. What is the index of refraction for glass?
  
• Which set of the three quantum numbers (n, l, ml) corresponds to a 3d orbital?
  
• If a substance has a half life of one million years, how much of its will be left after three million years? After four million years?
  
• Question #748a3
  
• The half-life of cesium-137 is 30.2 years. If the initial mass of a sample of cesium-137 is 1.00 g, how much will remain after 30.2 years?
  
• How do you determine if a reaction is a fission or fusion reaction?
  
• What is an acetyl group?
  
• Can carbon-14 be used to determine the date of inorganic compounds?
  
• Question #37c39
  
• What is the temperature, in K, of 2.20 moles of gas occupying 3.5 L at 3.30 atm?
  
• How much energy, in joules, must be absorbed if all the `O_3` molecules in the sample of air are to dissociate? Assume that each photon absorbed causes one `O_3` molecule to dissociate, and that the wavelength of the radiation is 254 nm.
  
• In the equation `2KClO_3 -> 2KCI + 3O_2`, how many moles of oxygen are produced when 5.05 m of `KClO_3` decompose completely?
  
• How do nuclear charge and shielding effect the periodic trend and group trend of ionization energy?
  
• Gold ions form complexes with cyanide ion according to the equation: `"Au"^(+)(aq) + 2 "CN"^(-) -> ["Au"("CN")_2]^(-)`; `K_f = 2xx10^38` What is the standard state free energy for this reaction?
  
• The Calorie used on food labels is equal to how many calories?
  
• The value of Ksp for Ni(OH)2(aq) is 6.0x10^-16. What is the molar concentration of nickel ions in a saturated pH=7.0 buffer solution? Assume the buffer is sufficiently strong that the pH does not change during equilibration.
  
• If you mix salt into pure water what is this mixture considered?
  
• Question #bb66f
  
• Why are single bonds saturated?
  
• Fires from combustible metals produce what type of fire?
  
• Question #877df
  
• What is alpha decay?
  
• What is the molar mass of a gas that has a density of 1.18g/L at 25°C and 1 atm?
  
• How do I find the percentage composition of Nitrogen in N_2O5?
  
• How does electron configuration effect electronegativity?
  
• Question #9d802
  
• Question #6a833
  
• Question #249e6
  
• Question #25fad
  
• How do ionic compounds conduct electricity in water?
  
• Question #103ea
  
• How many valence electrons does iron have?
  
• Question #75f5c
  
• Question #84bc6
  
• What does nuclear chemistry involve?
  
• Question #fbab1
  
• How can atoms exceed the octet rule?
  
• Why is it impossible to predict exactly where an electron is at a given moment?
  
• Question #b171f
  
• How does alpha decay change the nucleus of a radioactive atom?
  
• A 23.0 g sample of I2(g) is sealed in a gas bottle having a volume of 500 mL. Some of the molecular I2(g) dissociates into iodine atoms and after a short time the following equilibrium is established. I2(g-->2I(g) For this system, Kc= 3.80 x 10^-5. What mass of I2(g) will be in the bottle when equilibrium is established?
  
• When should I use the ideal gas law and not the combined gas law?
  
• What is the difference between an atom and an element?