Answer
The answer is attached below.
Work Step by Step
Carboxylic acids are drawn according to the nomenclature system rules set by the IUPAC.
1. In 3-ethylheptanoic acid, the longest hydrocarbon chain contains 7 carbon atoms.
2. The carboxylic acid group is attached to the carbon on the right-hand side. The numbering starts from this carbon atom.
3. An ethyl group is attached to the carbon number 3.
