A mixture of propane and butane is burned in air. Partial analysis of the stack gas produces the following dry-basis volume percentages: 0.0527% C3H8, 0.527% C4H10, 1.48% CO, 7.12% CO2. The stack gas is at an absolute pressure of 780 mm Hg and the dew point of the gas is 46.5oC. Calculate the molar composition of the fuel.