Mass-Mass Problem Set
1. Given the following equation
Mg + 2HCl → MgCl2 + H2
a. how many grams of magnesium are needed to produce 100.0g of
b. how many grams of hydrogen chloride are needed to produce 200.0g
c. If 500.0g of magnesium chloride is produced in the above reaction,
then how many grams of hydrogen would be produced?
2. Given the following balanced equation,
P4 + 5O2 → P4O10
a. how many grams of phosphorus (V) oxide are produced if you burn
50.0 grams of phosphorus with sufficient oxygen?
b. how many grams of oxygen would be needed in problem 2a?
c. if 400.0 grams of phosphorus (V) oxide are needed for another
experiment, how much phosphorus would have to be burned?
3. Given the balanced equation Br2 + 2NaI → 2NaBr + I2, how many grams
of sodium bromide could be produced from 172g of Bromine gas (Br2)?
4. How many grams of hydrogen gas are needed to produce 5000g of ammonia
gas according to the following equation N2 + 3H2 → 2NH3?
5. Calculate the mass of mercury metal that is required to produce 29.8g of
mercury (I) oxide according to the following balanced equation.
4Hg + O2 → 2Hg2O
6. How many grams of water vapor will be produced when 1.18g of hydrogen
gas reacts completely with oxygen gas according to the balanced equation?
2H2 + O2 → 2H2O
7. Aluminum metal reacts with sulfur to form aluminum sulfide according to the
following balanced chemical reaction.
2Al + 3S → Al2S3
How much sulfur will be required to manufacture 1.00kg of aluminum sulfide?
8. Given the chemical equation 12HCl + P4 → 4PCl3 + 6H2, how much
phosphorus trichloride will be produced from 500.0g of hydrochloric acid?