Answer
Heptane is $CH_{3}CH_{2}CH_{2}CH_{2}CH_{2}CH_{2}CH_{3}$
Work Step by Step
Heptane has 7 carbon atoms, all single bonds, and hydrogen atoms to complete the 4 bonds of each carbon atom. Its formula is $CH_{3}CH_{2}CH_{2}CH_{2}CH_{2}CH_{2}CH_{3}$
