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Chemistry 9 Online
OpenStudy (anonymous):

Which of the following gases is the heaviest? O2, CH4, CO2, Cl2 O2 CH4 CO2 Cl2

OpenStudy (matt101):

The one with the highest mass: O2 = 32 amu CH4 = 16 amu CO2 = 44 amu Cl2 = 70 amu Cl2 is heaviest.

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