Write the formula and name of the lower homologue of ethanoic acid.

Explanation

To find the formula and name of the lower homologue of ethanoic acid, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Structure of Ethanoic Acid**:
- Ethanoic acid (commonly known as acetic acid) has the chemical formula \( \text{C}_2\text{H}_4\text{O}_2 \) or structurally represented as \( \text{CH}_3\text{COOH} \).
- It contains two carbon atoms.

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