Five liters of liquid n-hexane and 4 liters of liquid n-heptane are mixed and burned with 400 mol of air. Not all of the hydrocarbons are burned in the furnace, and both CO and CO2 are formed. Calculate the percent excess air supplied to the furnace.
A) 5.6%
B) 7.2%
C) 8.5%
D) 9.1%
