When shaking a mixture of 0.175 cm3 of mineral oil with 250 cm3 of an aqueous solution of Congo with a concentration of 0.100 wt. %, an emulsion with a radius of oil droplets of 4.35 × 10–7 m was obtained. The content of Congo in the solution decreased by 0.045 g. The molar mass of Congo is 690 g/mol. Calculate the adsorption G.

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