Which one of the following pairs of gases con | vedclass

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(A) The number of molecules is directly proportional to the number of moles $(n = \frac{	ext{mass}}{	ext{molar mass}})$.For option $(A)$:$n(O_2) = \

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$16 \ g$ of $O_2$ and $14 \ g$ of $N_2$

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(A) The number of molecules is directly proportional to the number of moles $(n = \frac{	ext{mass}}{	ext{molar mass}})$.For option $(A)$:$n(O_2) = \frac{16 \ g}{32 \ g/mol} = 0.5 \ mol$$n(N_2) = \frac{14 \ g}{28 \ g/mol} = 0.5 \ mol$Since the number of moles is the same,the number of molecules is also the same.

Which one of the following pairs of gases contains the same number of molecules?

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