Benzopyrene is a hydrocarbon that is known to cause cancer. Combustion analysis (see Problem 4.108) of a 2.44-g sample of this compound shows that combustion produces 8.54 g of CO₂ and 1.045 g of H₂O. What is the empirical formula of benzopyrene?

Data from problem 4.108

Elemental analysis is sometimes carried out by combustion of the sample. For a hydrocarbon, the only products formed are CO₂ and H₂O. If a 1.36-g sample of an unknown hydrocarbon is burned and 2.21 g of H₂O is produced along with 4.07 g of CO₂, what is the empirical formula of the hydrocarbon?