Thomas Graham found experimentally that the rate of effusion of a gas is inversely proportional to the square root of the mass of its particles. The equations of Graham's law of effusion, is square root of the molar mass of gas one over the square root of the molar mass of gas two. ... To find pressure we need to calculate the force per unit of area. 2mu2 divided by L divided by 6L2 which is equal to mu2 divided by 3V this is the pressure of one molecule on the walls of the cube. ...

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• Grade Level: High School