# What two substances could be produced in a combustion reaction?

Carbon dioxide ($C {O}_{2}$) and Water (${H}_{2} O$)

#### Explanation:

Combustion reactions are reactions involving hydrocarbons and oxygen to produce carbon dioxide and water.

Ex. Combustion of methane

$C {H}_{4} + {O}_{2} \implies C {O}_{2} + {H}_{2} O$

Ex. Combustion of octane

$2 {C}_{8} {H}_{18} + 25 {O}_{2} \implies 16 C {O}_{2} + 18 {H}_{2} O$