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Place the gases listed below in order from the slowest moving to fastest moving when the gases are at 25 C. O2, N2, F2, Cl2

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youislove
The way I solved this is through looking at the gases' weights on the periodic table. The heavier the gas is, the slower it will move (correct me if I'm wrong).

Cl2, F2, O2, N2

Cl2, F2, O2, N2....................

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