15. Ethanol (C₂H₆O) is combusted in air according to the following reaction:
2 C₂H₆O (l) + 4 O₂ (g) → 4 CO₂ (g) + 6 H₂O (g)
a. How many grams of water could be produced by the complete combustion of 75.2 g ethanol in the
presence of excess oxygen?
b. If 71.3 g of water were collected during an experiment, what is the percent yield?
