A boiler is fired with a high grade fuel (consisting only of hydrocarbons). The temperature of the fuel and air entering the combustion chamber is 25C. The air is assumed to be dry. The flue gases leave at 300C and their average dry basis analysis showed 11.2%CO2, 0.4%CO,6.2%O2 and 82.2%N2. a. Calculate the amount of air fed to the chamber. b. Predict the molecular formula of the fuel entering the chamber. c. Calculate the % excess oxygen fed to the reactor. [2] [2]