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Chemistry 20 Online
OpenStudy (anonymous):

Under certain conditions argon (Ar) gas diffuses at a rate of 3.2 centimeters per second. Under the same conditions, an unknown gas diffuses at a rate of 4.5 centimeters per second. What is the approximate molar mass of the unknown gas

OpenStudy (cuanchi):

Graham's law http://en.wikipedia.org/wiki/Graham's_law

OpenStudy (anonymous):

what are the answers

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