Name the acid present in vinegar.

Explanation

**Step-by-Step Solution:**

1. **Understanding Vinegar**: Vinegar is a common household substance known for its sour taste and is often used in cooking and food preservation.

2. **Identifying the Acid**: The question asks for the specific acid that is present in vinegar.

3. **Recognizing the Acid**: The acid found in vinegar is known as acetic acid. It is also referred to as ethanoic acid in IUPAC nomenclature.

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