Amixture of propane and butane is burned with air. partial analysis of the stack gas produces the following dry-basis volume percentages: 0.0810% c3h8, 0.1140% c4h10, 1.049% co, and 9.905% co2. the stack gas is at an absolute pressure of 780.0 mm hg and the dew point of the gas is 50.71°c. calculate the molar composition of the fuel. (note: carry five significant figures throughout the calculation.)