What is the IUPAC name for C6H14?

The molecular formula C6H14 corresponds to a straight-chain alkane with six carbon atoms. According to IUPAC nomenclature rules, the names of alkanes are derived from the number of carbon atoms they contain. The prefix for six carbon atoms is "hex," which leads to the name hexane.

Alkanes follow the general formula CnH2n+2, and for six carbon atoms (n = 6), the calculation yields C6H14. This confirms that hexane is indeed the correct name.

The other options refer to alkanes with different numbers of carbon atoms. For example, octane contains eight carbon atoms (C8H18), nonane has nine carbon atoms (C9H20), and decane consists of ten carbon atoms (C10H22). Each of these have different hydrogen counts and would therefore have different molecular formulas, distinguishing them from hexane.