Combustion of 47.60mg of cumene CxHy produces 156.85mgCO2(g) and 42.80mgHH2O(l). The molar mass of H2O is 18.01g/mol. The molar mass of CO2 is 44.01g/mol. 10. What is the empirical formula for cumene CxHy ? A) C3H4 B) C1H2 C) C4H3 D) C2H1 11. The molar mass of cumene is between 90 and 150g/mol. What is the molecular formula for cumene? A) C9H18 B) C9H12 C) C16H9 D) CiH4