A synthesis gas consists of 64% hydrogen, 33% carbon monoxide, 2% oxygen and the remainder is non-combustible solid matter. Calculate the stoichiometric air/fuel ratio. (a) 60 kg air is supplied for the combustion of 1 kgmol of synthesis gas, verify if the air-fuel mixture is lean or rich. (b) If the mixture consists of 20% excess air, calculate the actual air/fuel ratio.

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