116. The following table shows the dependence of the surface tension of solutions of n-hexyl alcohol in water on concentration at 39.0 °C.

C, mmol/L 0 1.85 2.50 3.70 4.90 7.40 9.80 14.7 19.6 29.4
b, mN/m 70.1 66.8 65.1 62.5 60.4 56.8 53.3 49.3 45.4 38.7

Find the limiting adsorption of alcohol Г by a graphical method, and calculate the area occupied by 1 molecule of alcohol in a saturated adsorption layer, assuming monomolecular adsorption.

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