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# It takes a certain amt. of helium atoms 10. s to effuse through a porous barrier.?

It takes a certain amt. of helium atoms 10. s to effuse through a porous barrier. How long does it take the same amount of methane molecules to effuse through the same barrier under the same conditions?

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- DineshLv 58 years agoFavorite Answer
Follow Graham's law of diffusion.square root of M2/M1=t2/t1

M1=4(He),t1=10;M2=16(CH4);t2=?

substitue the values and calculate the answer is 20 sec

Source(s): chemiphyindran.blogspot.com

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