Calculate the oxidatin number of Fe in
(i) `Fe_3O_4` (ii) `Fe_4[Fe(CN)_6]_3`

Explanation

To calculate the oxidation number of Fe in the compounds \( \text{Fe}_3\text{O}_4 \) and \( \text{Fe}_4[\text{Fe(CN)}_6]_3 \), we will follow a systematic approach.

### Step-by-Step Solution

#### (i) Calculation of the oxidation number of Fe in \( \text{Fe}_3\text{O}_4 \)

1. **Identify the oxidation state of oxygen**:
- The oxidation state of oxygen (O) is typically \(-2\).
...