Which alkane has 6 carbon atoms?

The alkane that contains 6 carbon atoms is hexane. In organic chemistry, the naming of alkanes follows a systematic nomenclature based on the number of carbon atoms in the longest continuous chain.

For alkanes, each prefix corresponds to a specific number of carbon atoms:

• The prefix “hex-” indicates that there are six carbon atoms. Thus, hexane is the correct name for the alkane with this number of carbons.

The other options correspond to alkanes with different numbers of carbon atoms. Heptane has 7 carbon atoms, octane has 8, and nonane has 9. Each of these names reflects the specific number of carbons in their molecular structure, reinforcing the idea that the correct answer, hexane, is uniquely identified by its six carbon atoms.