6. Below are data on the adsorption of water vapor by macroporous silica gel. Using the Langmuir equation, determine the capacity of the adsorption layer in mol/kg. The volume of adsorbed water vapor is reduced to normal conditions:
P, Pa 11.78 18.14 30.00 45.30 54.26 68.60
A*103, m3/kg 4.4 6.0 7.4 9.2 10.8 12.0

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