Various types of engines have been studied that generate low levels of pollutants because they do not use gasoline. The use of compressed gas as a source of energy to drive vehicles has also been suggested. When carrying out a test, 20 lb of fuel (C2H4) were burned in the presence of air (21% mol of O2 and 79% mol of N2) and considering an excess of 35%. Determine the composition resulting from the combustion in % mole and % weight, with a yield of 80%, according to the following chemical reaction:

C2H4+3O22CO2+2H2O