Which has the maximum number of molecules?

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Question

(B) The number of molecules is directly proportional to the number of moles $(n = \frac{	ext{mass}}{	ext{molar mass}})$.$7 \ g$ $N_2 = \frac{7}{28}

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$2 \ g$ $H_2$

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(B) The number of molecules is directly proportional to the number of moles $(n = \frac{	ext{mass}}{	ext{molar mass}})$.$7 \ g$ $N_2 = \frac{7}{28} = 0.25 \ mol$$2 \ g$ $H_2 = \frac{2}{2} = 1 \ mol$$16 \ g$ $NO_2 = \frac{16}{46} \approx 0.348 \ mol$$16 \ g$ $O_2 = \frac{16}{32} = 0.5 \ mol$Since $2 \ g$ $H_2$ has the highest number of moles $(1 \ mol)$,it contains the maximum number of molecules.

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