Question

which is the name of $\ce{c5h12}$?
\bigcirc n-butane
\bigcirc n-hexane
\bigcirc n-heptane
\bigcirc n-pentane
\bigcirc all of the above

Explanation:

The formula \(C_5H_{12}\) follows the alkane general formula \(C_nH_{2n+2}\) (here \(n=5\), so \(2×5+2=12\)). The prefix "pent-" corresponds to 5 carbon atoms, so the straight-chain (n-) alkane is n-pentane. Other options have different carbon counts: butane (4), hexane (6), heptane (7).

Answer:

D. n-pentane