Determine the percentage composition of $K$ in $K M n O_{4}$ .

31 %

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43.58 %

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25 %

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55 %

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Solution

The correct option is D $25 %$
To find:- $%$ composition of K in $K M n O_{4}$
A/c
Molar mass of $K = 39$ g
Molar mass of $K M n O_{4} = 158$ gm
$%$ of k in $K M n O_{4} = \frac{39}{158} \times 100 = 24.68 %$
$\approx 25 %$ .
Option C is correct.

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