Draw the structures for the following compounds:
(i) Ethanoic acid
(ii) Bromopentane
(iii) Butanone
(iv) Hexanal
Are structural isomers possible for bromopentane?

Explanation

To draw the structures for the given compounds, we will follow these steps:

### Step 1: Draw the structure of Ethanoic Acid
1. Ethanoic acid (also known as acetic acid) has the molecular formula C₂H₄O₂.
2. The structure consists of a carboxylic acid group (-COOH) attached to a two-carbon alkane (ethane).
3. The structural formula can be represented as:
```
O
...