Balance the chemical equation by the oxidation number method.
(ii) `P + HNO_(3) to HPO_(3) + NO + H_(2)O`

Explanation

To balance the chemical equation \( P + HNO_3 \rightarrow HPO_3 + NO + H_2O \) using the oxidation number method, follow these steps:

### Step 1: Assign Oxidation Numbers
1. **Phosphorus (P)** in its elemental state has an oxidation number of **0**.
2. In **Nitric Acid (HNO3)**:
- Hydrogen (H) = +1
- Oxygen (O) = -2 (3 O atoms contribute -6)
- Let the oxidation number of Nitrogen (N) be \( x \):
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