A gaseous mixture contains and in the ratio by weight. The ratio of their number of molecules is: | Mole Concept and Some Basic Concepts of Chemistry — Chem-Mantra

Question

A gaseous mixture contains $O_2$ and $N_2$ in the ratio $1:4$ by weight. The ratio of their number of molecules is:

Answer: C

💡 Solution & Explanation

$\text{Ratio of moles} = (1/32) : (4/28) = (1/32) : (1/7) = 7 : 32$. <br>$\text{Ratio of molecules} = \text{ratio of moles} = 7 : 32$.

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