Chemistry – Stoichiometry Study Guide
1
Draw and label the stoichiometry diagram that will help you with your calculations.
Write all 6 mole ratios for the following chemical equation. You do not need to reduce.
___ Na3N  ___ Na + ___ N2
1)
4)
2)
5)
3)
6)
Perform the following calculations. Reference the chemical equation above. Answer with the correct
significant figures.
7) How many moles of sodium metal will be produced by the decomposition of 6.22 mol of sodium nitride?
(Moles A to Moles B)
8) How many formula units of sodium nitride are required to produce 13.45 mol of nitrogen gas? (Mole A to
Particles B)
9) 8.16 x 1024 formula units of sodium nitride will produce how many moles of sodium metal? (Particles A
to Moles B)
10) What mass, in grams, of sodium nitride will produce 4.35 mol of nitrogen gas? (Moles A to Mass B)
Chemistry – Stoichiometry Study Guide
2
11) 7.44 g of sodium metal requires the decomposition of how many moles of sodium nitride? (Mass A to
Moles B)
12) 9.21 x 1011 formula units of sodium nitride will decompose into how many atoms of sodium metal?
(Particles A to Particles B)
13) If 43.56 g of sodium metal are produced in the decomposition of sodium nitride, what mass of nitrogen
gas will also be produced? (Mass A to Mass B)
14) 8.77 x 1024 molecules of nitrogen gas would be expected from the decomposition of how many grams of
sodium nitride? (Particles A to Mass B)
15) 87.34 g of sodium nitride will produce how many atoms of sodium? (Mass A to Particles B)
Calculate the percent yield for the reaction. Answer with the correct significant figures.
16) A combustion reaction produces 9.87 g of H2O, but it was calculated that 12.32 g would be produced.
What is the percent yield?