Which of the following element's gram weight is $6 g$ for $0.25$ moles of that element?

Chlorine

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Magnesium

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Boron

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Carbon

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Solution

The correct option is B Magnesium
Given that
gram weight $= 6 g$
Moles $= 0.25$
Molecular weight $= \frac{g r a m w e i g h t}{m o l e s}$
$= \frac{6}{6.25}$
$= 24 g / m o l$
Mg has molecule weight $24 g / m o l$

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