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Grahams Law and Molar Mass

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The table below provides data from an effusion experiment for Gas X and Gas Y. According to Graham’s law of effusion, rateXrateY=MYMX\frac{\text{rate}_X}{\text{rate}_Y} = \sqrt{\frac{M_Y}{M_X}}, what is the molar mass of Gas Y?

Gas Effusion Time (s) Molar Mass (g/mol)
Gas X 12 4
Gas Y 24 ?
A

12 g/mol

B

8 g/mol

C

16 g/mol

D

32 g/mol

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