142. Solving a chemistry problem

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Calculate the constants of the Shishkovsky equation if the surface pressure of n-valerianic acid at 292 K, depending on the surface area located per 1 mol of this substance, is:
n * 10 ^ 2 N / m 3.5 5.3 7.8 11.0 14.9 19.2 23.6 28.5 33.6
Sm * 10 ^ -5 m2 / mol 6.92 4.66 3.49 2.77 2.44 2.27 2.11 2.03 1.89
A solution of n-valerianic acid with a concentration of 3 mmol / L has a surface pressure of 4.2 * 10 ^ -3 N / m

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