Question

what is the name of the hydrocarbon ch₃(ch₂)₆ch₃?
butane
decane
octane
propane

Explanation:

The general formula for alkanes is $C_nH_{2n + 2}$. In $CH_3(CH_2)_6CH_3$, count the number of carbon atoms. There are 8 carbon atoms. Alkanes with 8 carbon - atoms are named octane. Butane has 4 carbon atoms, decane has 10 carbon atoms, and propane has 3 carbon atoms.

Answer:

C. octane