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Q3. Benzene (C₆H₆) is burned in 15% excess air by mass.

Analysis of the exhaust gas shows they contain 0.05 kg of carbon monoxide per kg of fuel burned.

Calculate EACH of the following:

(a) the mass of carbon burned to C0₂ per kg of fuel; (4)

(b) the air to fuel ratio by mass; (4)

(c) the volumetric analysis of the exhaust gas. (8)

Note: atomic mass relationships H —1, C = 12, O = 16, N = 14

air contains 23.3% oxygen by mass.