1. For the chemical reaction, 2Al+3H2SO4⟶3H2+Al2(SO4)3

what mass of sulfuric acid in grams is needed to produce 1.89 mol of aluminum sulfate?

2. The combustion of propane may be described by the chemical equation

C3H8(g)+5O2(g)⟶3CO2(g)+4H2O(g)

How many grams of O2(g) are needed to completely burn 73.6 g C3H8(g)?
mass O2:
g O2

3. Gaseous hydrogen and oxygen can be prepared in the laboratory from the decomposition of gaseous water.

The equation for the reaction is

2H2O(g)⟶2H2(g)+O2(g)

Calculate how many grams of O2(g) can be produced from 58.9 g H2O(g).