C3H8 +  O2 CO2 + H2O    balance
How many mol of O2 does it take to
completely burn 7.0 mol of C3H8?
How many mol each of CO2 and H2O are
produced?
How many grams of oxygen does it take to
completely burn 25.0 g of C3H8?
How many grams each of CO2 and H2O are
produced when 25.0 g of C3H8 is burned?