13. Polystyrene with a molecular weight of 300,000 is adsorbed from a toluene solution on a carbon adsorbent having a specific surface area of 0.12 m2/g. The value of the limiting adsorption during the formation of a monolayer is 0.033 g/kg. Calculate the area per polystyrene molecule in a dense monolayer and the number of molecules on the surface of 1 kg of adsorbent.

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