A gaseous fuel mixture of 60 percent propane (C3H8), and 40 percent butane (C4H10), on a volume basis is burned in air such that the air-fuel ratio is 19 kg air/kg fuel when the combustion process is complete. Determine
(a) The moles of nitrogen in the air supplied to the combustion process, in kmol/kmol fuel, (b) The moles of water formed in the combustion process, in kmol/kmol fuel
(c) The moles of oxygen in the product gases in kmol/kmol fuel.