The combustion of propane (c3h8) in the presence of excess oxygen yields co2 and h20: c3h8 (8) + 5o2 (g) - 3co2 (s) + 4h20 (8) when 2.5 mol of o2 are consumed in their reaction, a) 3.0 b) 7.5 c) 1.5 mol of co2 are produced. d) 4.2 e) 2.5