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Which of the following gases will have the slowest rate of effusion at a given temperature? N2 H2 He Ar

Which of the following gases will have the slowest rate of effusion at a given temperature? N2 H2 He Ar
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5 votes
Which of the following gases will have the slowest rate of effusion at a given temperature?

N2

H2

He

Ar

asked
User Smack
by
8.0k points

1 Answer

2 votes
The answer is Ar.
Rate of effusion is inversely proportional to molecular weight. Of the four choices, Ar has the highest molecular weight and consequently the lowest rate of effusion.
answered
User Pieter Van Ginkel
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