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A high grade fuel oil containing only C and H is burnt in a furnace that...

A high grade fuel oil containing only C and H is burnt in a furnace that is well designed and well operated, giving a combustion gas, the Orsat analysis of which shows 12.4 % CO2, 3.7 % O2 and 83.9 % N2 and inerts. The air is substantially dry. Calculate a) % excess air b) C to H in the fuel

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