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A Scottish chemist Thomas Graham observed and experimented with gas particles in the 1800s. He formulated a mathematical equation that describes the relationship between the mass of a gas molecule and
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A Scottish chemist Thomas Graham observed and experimented with gas particles in the 1800s. He formulated a mathematical equation that describes the relationship between the mass of a gas molecule and its rate of effusion. This relationship is

User Parth Doshi
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This relationship is law because it describes what happens without explaining why.
User Robin Coe
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