4. The dry exhaust gas analysis from an engine burning a hydrocarbon diesel fuel is as follows: CO2 =.121, O2=.037, N2 = .842. Determine the molar composition of the fuel,the

gravimetric composition of the fuel, the equivalence ratio of the fuel/air mixture under these sampling conditions, the fuel/air ratio on a mass basis under these sampling conditions, and the stoichiometric air/fuel ratio for this fuel.