please no hand writing solution for up wote

The following analyses of a sample of coal are as follows: 82% - carbon, 13.0% - hydrogen, 1.0% - oxygen, 0.8% - sulphur Remainder - ash (does not pass out of the stack with the flue gas). Note: This coal is burned in a furnace using 15% excess air. Note: use 23% and 77% for Oz and N2 ratio respectively for 100% air, and the relation 8/3(C) + 8(H - O2 /8) + S for theoretical oxygen. The mass of N2 in flue gas in kg, per kg of coal is most nearly: 15.01 9.65 18.34 25.5 12.39