Determine the actual molar and mass airfuel ratios- the

Question

The combustion of an unknown amount of propane (x moles of C₃H₈) in an industrial oven produces the following dry exhaust gas analysis on a volume basis: 5.52% CO₂, 12.59% O₂, and 81.89% N₂. Determine

a. The actual molar and mass air/fuel ratios.

b. The percent of theoretical air used.

c. The volume percentage of water vapor in the exhaust gas before it was dried for this analysis.