6. During the adsorption of stearic acid on calcium sulfate from a toluene solution of various concentrations, the following experimental data were obtained:
С• kg/m3 2.5 5.0 7.5 10
А •102, mol/kg 2.0 3.75 5.5 7.5

Determine the specific surface area of the adsorbent if it is known that the area occupied by one acid molecule in a saturated monolayer is 20.5 (A0)2.

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