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28.Which of the following gases has the lowest rate of diffusion? (H=1.0,C=12.0,N=14.0,O=16.0) A.Nitrogen B.Ammonia C.Oxygen...

28.Which of the following gases has the lowest rate of diffusion?
(H=1.0,C=12.0,N=14.0,O=16.0)
A.Nitrogen
B.Ammonia
C.Oxygen
D.Methane
(please post answer with explanation)?

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