All the oxygen in 0.5434g sample of pure oxide of iron is removed by reduction in a stream of `H_(2)`. The loss in weight is 0.1210g. What is the formula of the oxide of iron ? (At. Mass of Fe = 56)

Explanation

To determine the formula of the oxide of iron from the given data, we can follow these steps:

### Step 1: Calculate the mass of oxygen in the sample
The loss in weight during the reduction process corresponds to the mass of oxygen that was removed.

Given:
- Loss in weight = 0.1210 g

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