How many nitrogen atoms are there in 51.0 g of (NH4)2SO4 (ammonium sulfate, 132.14 g/mol)?

Mass analysis of a common drying agent of organic molecules reveals that it has the empirical formula P2O5. If the molar mass is 283.89 g/mol, which molecular formula is correct?

What best explains the following chemistry meme:

10.0 g of hydrogen gas (2.016 g/mol) is reacted with excess oxygen gas to produce water vapor (18.0 g/mol) at 0.982 atm and 300.15 K. What volume of water vapor in L will be produced by this reaction?  2H2(g) + O2(g) –> 2H2O(g) Do not include units in your answer, just the number in L.

What are the coefficients for the chemical equation below, once  balanced?      ___ CH3CH2CH2OH(l) + ___O2(g)

Which of the following is most soluble in water?

Rank the following solutions and compounds from the most conductive to the least conductive.

Use the dropdown boxes to balance the reactions below.  If a coefficient is one, normally we would leave it blank.  However, for the sake of testing it will be okay to choose “1” for balancing an equation.  Hg(OH)2+ H3 PO4–> Hg3(PO4)2 + H2O

Which of the following best represents Avogadro’s number?

Which of the following statements regarding the kinetic molecular theory of gases is NOT correct?