4 NH3 7 O2 ----> 4 NO2 6 H2O (OR 4 NH3 7 O2 right arrow 4 NO2 6 H2O) How many grams of O2 gas are needed to produce 1,464 grams of water? The molecular weight of water is 18.02 g/mol The molecular weight of O2 is 32.00 g/mol Do not type units with your answer