Prob 3 (13.11) Coal with the mass analysis 79.2% C, 5.7% H2, 10% O2, 1.5% N2, 0.6% S, 3% noncombustible ash burns completely with the theoretical amount of air. Determine

(a) the air-fuel ratio on a mass basis. (b) the amount of SO2 produced, in kg per kg of coal.