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The mean free path for methane at a temperature of 266 K and a pressure of 1.11 x 10 Pa is 4.81 x 10-8

The mean free path for methane at a temperature of 266 K and a pressure of 1.11 x 10 Pa is 4.81 x 10-8 m. Find the effective radius r of the methane molecule. x10-10 m r

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