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Q3. A pure hydrocarbon fuel is completely burned in air.

The dry flue gas analysis shows they contain 15% carbon dioxide and 2.5% oxygen by volume.

(a) Determine the full combustion equation in kmols per kmol of fuel. (8)

(b) Calculate EACH of the following:

(i) the percentage mass analysis of the fuel; (4)

(ii) the gravimetric analysis of the wet exhaust gas. (4)

Note:  Relative atomic masses H=1, C=12, N=14, O=16

Air contains 21% oxygen by volume.