What is the correct balance of the equation for the combustion of propane, C3H8?- C3H8 + O2 → CO2 + H2O- C3H8 + 5O2 → 3CO2 + 4H2O- CO2 + H2O  → C3H8 + O2- 2C3H8 + 8O2 → 6CO2 + 5H2O