Dry coke composed of 4% inert solids (ash), 90% carbonand 6% hydrogen is burned in a furnace with dry air. Thesolid refuse left after combustion contains 10% carbonand 90% inert ash (no hydrogen). The inert ash contentdoes not enter into the reaction. The Orsat analysis ofthe flue gas gives: 13.9% CO2, 0.8% CO, 4.3% O2, and81.0% N2. Calculate the percent excess air?