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A natural gas with the molar analysis 78% CH4, 13% C₂H6, 6% C3H8, 1.7% C4H10, 1.3% N₂ burns completely with 30% excess air in a reactor operating at steady state. The molar flow rate of the fuel is 3.5 kmol/h and air is 21% O₂ and 79% N₂ on a molar basis. Determine the molar flow rate of the air, in kmol/h. Determine mass flow rate of the air, in kg/h Determine the mole fraction of water vapor in the products trance imago toxt