Determine the oxidation number of O in the following:
`OF_(2),Na_(2)O_(2) and CH_(3)COOH`.

Explanation

To determine the oxidation number of oxygen in the compounds OF₂, Na₂O₂, and CH₃COOH, we will analyze each compound step by step.

### Step 1: Determine the oxidation number of O in OF₂

1. **Assign Variables**: Let the oxidation number of oxygen be \( x \).
2. **Identify Oxidation States**: Fluorine (F) has an oxidation number of -1 (it is the most electronegative element).
3. **Set Up the Equation**: The sum of oxidation numbers in a neutral compound is zero. Therefore, we can write the equation:
\[
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