Butane (c4h20) burns completely with 110% of theoretical air entering at 74°f, 1 atm, 50% relative humidity. the dry air component can be modeled as 21% o2 and 79% n2 on a molar basis. the combustion products leave at 1 atm. step 1 for complete combustion of butane(c4h10) with the theoretical amount of air, what is the number of moles of oxygen (o2) per mole of fuel? the tolerance is +/-2%