In a quantitative determination of iron in an ore, an analyst converted `0.42` g of the ore into its ferrous form . This required `42.00` mL of `0.1` N solution of `KMnO_(4)` for titration.
How many equivalents of iron were present in the sample of the ore taken for analysis ?

Explanation

To determine the number of equivalents of iron present in the sample of ore, we can follow these steps:

### Step 1: Calculate the equivalents of KMnO4 used in the titration.
The formula to calculate equivalents is given by:
\[ \text{Equivalents} = \text{Normality} \times \text{Volume (L)} \]

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