Question 3: A natural gas has the following molar analysis: CH4,
80. 62%; C2H6, 5, 41%; C3H8, 1. 87%; C4H10, 1. 60%; N2, 10. 50%.
The gas is burned with dry air, giving products having a molar
analysis on a dry basis: CO2 7. 8% CO, 0. 2%; 02, 7% N2, 85%. (a)
Determine the air - fuel ratio on a molar basis. (b) Assuming ideal
gas behavior for the fuel mixture, determine the arrount of
products in kmol that...