A mineral contains of element M (at. wt. 50). The number of moles of M in of mineral is: | Mole Concept and Some Basic Concepts of Chemistry — Chem-Mantra

Question

A mineral contains $12.5\%$ of element M (at. wt. 50). The number of moles of M in $400 \text{ g}$ of mineral is:

Answer: A

💡 Solution & Explanation

$\text{Mass of M} = 400 \times 0.125 = 50 \text{ g}$. <br>$\text{Moles} = 50 / 50 = 1.0 \text{ mol}$.

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