Answers created by Slangus
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How do you multiply #(3x-2)^2#?
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Question #a910e
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Question #75b1b
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How do the Ka values for weak and strong acids compare?
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How are elements classified in the periodic table?
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When is the density of water #"1 g/mL"#? How can we measure density?
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Where does energy come from in a chemical reaction?
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Question #e21bc
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Given the reaction:Na2S2O3(aq) + 4Cl2(g) + 5H2O(aq) --> 2NaHSO4(aq) + 8HCl(aq),
how many moles of Na2S2O3 are needed to react with 0.12mol of Cl2?
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How many moles of #NO_2# are there in #1.81 * 10^24# molecules of #NO_2#?
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How do you convert .8333 as a fraction?
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What is 32ft/h in yd/day?
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Question #e44d4
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How much heat is necessary to vaporize 500 g of water at its boiling point?
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Question #3266a
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How do you measure specific heat?
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What is an example of a gas laws practice problem?
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How can I find specific heat in thermochemistry of phase of changes?
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Question #2b111
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Why can't photons be sharply localized?
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Question #8dee3
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How does an endothermic reaction change the entropy of the surroundings?
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Question #06b85
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Question #da056
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How does changing force or mass affects the acceleration of an object?
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How does hydrogen bonding affect the melting point?
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An element has 5 protons, 6 neutrons, and 5 electrons. What is the mass number?
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What are some examples of acid and base dissociation?
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Suppose you are a salesperson for the Acme Dynamite Company. Each month you earn $400 plus one sixth of your sales. What amount must you sell this month to earn more than $3000?
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Does an atoms mass number or atomic number ever change?
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What is meant by the term “excited state” as it applies to an electron?
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You run a 100-yd dash in 9.8 seconds. What is your speed in miles per hour?
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How many orbitals are in each of the sublevels (s,p,d,f)?
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What are examples of strong acids and bases, weak acids and bases, and neutral substances according to the pH scale?
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How does the Bohr's model of the atom explain line-emission spectra?
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What is the conjugate acid of ClO4-?
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Can you write and balance the equation for the complete combustion of ethane, #C_2H_6#?
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How do you find the average atomic mass?
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How do you find the height of a tree if the angle of elevation of its top changes from 20 degrees to 40 degrees as the observer advances 23 meters towards the base?
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How do you find the measure of angle B for the triangle with the following dimensions. A = 45° , a = 60.5 , b = 90?
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How do you simplify #5^3/5^2#?
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Question #88c8e
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Why is the Hess' law important in physics?
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What does the constant R in the Ideal Gas Law mean?
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Question #bfee9
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What is the electron configuration of fluorine?
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Question #c1a9b
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Question #19cbb
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How does the process of titration work?
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A solid rubber stopper has a mass of #33.0# grams and a volume of #30.0# #cm^3#. What is the density of rubber?
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How do you write #0.045# in scientific notation?
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Question #bd933
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How do you solve a triangle given a=10 b=8 B=130 degrees?
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Why does a strong acid have a weak conjugate base, whereas a weak acid has a relatively strong conjugate base?
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What makes a strong acid strong?
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How would you write the formula for
sodium perchlorate?
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A carpenter is building a stairway. The depth of each tread is 10 inches. The height of each riser is 8 inches. What is the steepness (slope) of the stairway?
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What is the conjugate base of HSO4-?
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Where do strong acids and bases fall on the pH scale?
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What is the specific heat of a material if a 6.0 g sample absorbs 50 J when it is heated from 30°C to 50°C?
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How would you balance the following equation:
Na2CO3 + BaCl2 --> NaCl + BaCO3?
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How do you solve a triangle given a = 8, c = 12, and B = 72?
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How would you identify a limiting reagent in a chemical reaction?
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How would you balance the following equation: HCI+NaOH --> H2O+NaCI?
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Question #f3642
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Question #2e118