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A gas diffuses 5/3 faster than carbon dioxide. Which gas might it be? a. O2 b. N2 c....

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jenmoss7 | Student, Undergraduate | eNotes Newbie

Posted November 14, 2011 at 6:57 AM via web

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A gas diffuses 5/3 faster than carbon dioxide. Which gas might it be?

a. O2

b. N2

c. CO

d. He

e. CH4

Please explain how this is so.

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ndnordic | High School Teacher | (Level 2) Associate Educator

Posted November 14, 2011 at 8:23 AM (Answer #1)

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According to Graham's Law, the ratio of the diffusion of the two gases is inversely proportional to the molar masses of the two gases.

5/3 = (M/44)^.5

.36 = M/44

M = 16 as the molar mass of the other gas.  That would be CH4

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