118. Determine the adsorption G of propionic acid on the interface of an aqueous solution - air at 18 C and a concentration of 0.1 mol / l according to the constants of the Shishkovsky equation: A \u003d 0.165 mol / l, B \u003d 0.178, σo \u003d 73.0 * 10-3 N/m

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