Determine the actual molar and mass fuelair ratios- the

Question

An unknown amount of ethane (x moles of C₂H₆) is burned in a combustion chamber with air. The dry gas molal analysis of the exhaust products is 6.64% CO₂, 10.46% O₂, and 82.9% N₂. Determine

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

b. The percent of excess air used.

c. The molar percentage of each combustion product before the exhaust gas was dried for this analysis.