CP CHEMISTRY
Stoichiometry III WS
Name: ___________________________
___ period
Solve the following problems. Show all work and units!!! Circle your answers.
(Balance the equation first!)
Mass to Mass
___ C2H2
+
___ O2

___ H2O
+
___ CO2
1.
How many grams of O2 are required to produce 15 g of H2O?
2.
How many grams of CO2 are produced from 50 g of C2H2?
3.
How many grams of H2O are produced if 75 g of CO2 are produced?
4.
How many grams of C2H2 are required to produce 105 g of CO2?
5.
How many grams of C2H2 are required to react with 500 g of O2?
CP CHEMISTRY, Stoichiometry II WS, page 2
6.
How many grams of copper(II) nitrate would be produced from 4.30 g of
copper metal reacting with excess nitric acid?
___ Cu + ___ HNO3  ___ Cu(NO3)2 + ___ NO2 + ___ H2O
7.
When Cu(OH)2 is heated, it decomposes to black CuO and H2O. How many
grams of CuO will be formed from the decomposition of 6.59 g of Cu(OH)2?
___ Cu(OH)2  ___ CuO + ___ H2O
8.
Molten iron and carbon monoxide are produced in a blast furnace by the
reaction of iron(III) oxide and coke (carbon). If 2500 g of pure Fe2O3 are
used, how many grams of iron can be produced?
___ Fe2O3 + ___ C  ___ Fe + ___ CO
9.
Ammonia, NH3, is produced in a synthesis reaction from nitrogen and
hydrogen gases. If an excess of nitrogen is reacted with 3.41 g of hydrogen,
how many grams of ammonia can be produced?
___ N2 + ___ H2  ___ NH3
10.
In a single displacement reaction, aluminum will react with hydrochloric acid
to produce aluminum chloride and hydrogen gas. If 9.23 g of aluminum are
reacted with excess HCl, how many grams of hydrogen are produced?
___ Al + ___ HCl  ___ AlCl3 + ___ H2