If a hydrocarbon such as methane (or ethane, propane, etc.) combusts completely in the presence of oxygen, the products are

The products are CO2 (carbon dioxide) and H2O (water).

Explanation:

Hydrocarbons are all organic compounds whose molecules are formed only by carbon and hydrogen atoms. When hydrocarbons burn completely in the presence of oxygen complete combustion occurs where the products formed are always carbon dioxide (carbon dioxide), CO2, and water, H2O.

Hydrocarbon + O2 → CO2 + H2O

Example of complete combustion of butane gas, one of the main components of cooking gas:

2 C4H10 + 13 O2 (g) → 8 CO (g) + 10 H2O (1)

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