Answer: carbon dioxide and water
Explanation: hydrocarbons are compounds of carbon and hydrogen. Combustion is another word for oxidation. Oxygen splits, the CH bonds, oxidising both the C and the H. The simplest hydrocarbons, the alkanes, have the general formula C(n)H(n+2)
The combustion reaction is
(3n+1)O2 + 2C(n)H(2n+2) —> 2nCO2 + (2n+2)H2O
