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In Langumir's model of adosrption of a g...

In Langumir's model of adosrption of a gas on a solid surface :

A

The rate of dissociation of adsorbed molecules from the surface does not depend on the surface covered

B

The adsorption at a single site on the surface may involve multiple molecules at the same time

C

The mass of gas striking a given area of surface is proportional to the pressure of the gas

D

The mass of gas striking a given area of surface is independent of the pressure of the gas

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