Under the same P and T,which of the following | vedclass

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(D) According to Graham's Law of Diffusion,the rate of diffusion $r$ is inversely proportional to the square root of the molar mass $M$ of the gas: $r

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$NO, C_2H_6$

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(D) According to Graham's Law of Diffusion,the rate of diffusion $r$ is inversely proportional to the square root of the molar mass $M$ of the gas: $r \propto \frac{1}{\sqrt{M}}$.For two gases to diffuse at the same rate,they must have the same molar mass.Calculate the molar masses of the given pairs:$A: NO = 14 + 16 = 30 \ g/mol$; $CO = 12 + 16 = 28 \ g/mol$ (Not equal)$B: NO = 30 \ g/mol$; $CO_2 = 12 + 32 = 44 \ g/mol$ (Not equal)$C: NH_3 = 14 + 3 = 17 \ g/mol$; $PH_3 = 31 + 3 = 34 \ g/mol$ (Not equal)$D: NO = 30 \ g/mol$; $C_2H_6 = (2 	imes 12) + (6 	imes 1) = 24 + 6 = 30 \ g/mol$ (Equal)Since $NO$ and $C_2H_6$ have the same molar mass,they will diffuse at the same rate.

Under the same $P$ and $T$,which of the following pairs of gases will diffuse at the same rate through a small jet?

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