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Mole Concept

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Question

Calculate the number of moles of magnesium present in a magnesium ribbon weighing $12 g$ . (GAM of magnesium is $24 g$ ).

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Solution

$Gram atomic mass of magnesium$ = $24 g$
$Number of moles$ = $\frac{Given mass}{Gram atomic mass}$
$Number of moles of Mg$ $= \frac{12 g}{24 g} = 0.5$

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