# Alkane

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An alkane is one of the four main types of hydrocarbons. Alkanes are true hydrocarbons, meaning they are made up of nothing but hydrogen and carbon.[1]

Alkanes are based on the formula $C_nH_{2n+2}$.

• $C$ is Carbon.
• $H$ is Hydrogen.
• $n$ refers to the number of molecules.

Many fossil fuels like methane ($CH_4$), ethane ($C_2 H_6$), propane ($C_3 H_8$), butane ($C_4 H_{10}$) and octane ($C_8 H_{18}$) are alkanes.