An anthracite coal has the following composition: C = 84.7 N =1.5 A= 5.8 H = 2.9 S =0.8 W = 2.7 O = 1.6 Calculate for completecombustion per pound of coal: a)Theoretical weight of oxygenrequired, b) Actual air needed if 35 % in excess, can you use moreor less oxygen