1kg coal sample, c:76,2\%, H2:5,0%,O2:10,6%,H2O:(1,N2:1,4% Ash: 5,7% Burning coal of ash was included 15,1% unfield coal Air was used 20% extra from requined a) Please calalate requrred air by volume b) Please calculat exhaust gasses by volump and tinal chamical compound by %