Question

part a
how many isomers exist for the alkane whose molecular formula is $\ce{c_{4}h_{10}}$?
\bigcirc 1
\bigcirc 2
\bigcirc 3
\bigcirc 4
\bigcirc none

Explanation:

Step1: Recall alkane isomer rules

Alkanes have only single bonds; isomers differ in structure.

Step2: List structures for C₄H₁₀

1. Straight chain: CH₃CH₂CH₂CH₃ (butane)
2. Branched chain: CH₃CH(CH₃)CH₃ (isobutane)

No other unique structures exist.

Answer:

B. 2