Stoichiometry
1)
Name _______________________
Period ___ Date __/__/__
Balance this equation and state which of the six types of reaction is taking place:
____ Mg + ____ HNO3  ____ Mg(NO3)2 + ____ H2
Type of reaction: __________________________
2)
If I start this reaction with 40 grams of magnesium and an excess of nitric acid, how many
grams of hydrogen gas will I produce?
3)
If 1.7 grams of hydrogen is actually produced, what was my percent yield of hydrogen?
4)
Balance this equation and state what type of reaction is taking place:
____ NaHCO3  ____ NaOH + ____ CO2
Type of reaction: __________________________
5)
If 25 grams of carbon dioxide gas is produced in this reaction, how many grams of sodium
hydroxide should be produced?
6)
If 50 grams of sodium hydroxide are actually produced, what was my percent yield?
7)
Which of the two percent yields calculated above is unreasonable? Explain.
Use the following to answer questions 1 & 2.
NaCl +
MgO 
Na2O + MgCl2
1. If 24 grams of sodium chloride reacts with an excess amount of magnesium oxide, how many
grams of sodium oxide will be produced?
2. If 53 grams of magnesium oxide reacts with an excess amount of sodium chloride, how many
grams of magnesium chloride will be made?
Use the following to answer questions 3 & 4.
Mg3N2 +
K2O 
MgO + K3N
3. If 14 moles of potassium oxide reacts with an excess amount of magnesium nitride, how many
grams of potassium nitride will be made?
4. How many grams of magnesium nitride is needed to react with an excess amount of potassium
oxide to produce 11.6 grams of magnesium oxide?
Use the following to answer questions 5 - 8.
C3H8 + O2 
H2O +
CO2
5. 32 grams of propane (C3H8) is burned in excess oxygen gas to produce how many grams of
water?
6. How many grams of oxygen gas is needed to make 30 grams of carbon dioxide?
7. If 0.45 grams of water is formed during the combustion of propane, how many grams of carbon
dioxide is formed?
8. How many grams of propane, C3H8, are needed to make 140 grams of water?