Fog is formed in humid air at a temperature of 271 K an

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Fog is formed in humid air at a temperature of 271 K and a supersaturation coefficient of 4.22. Calculate the critical size of the condensation nuclei and the number of molecules contained in them. The surface tension of water is 74 mJ / m2, the molar volume of water is 18*10–6 m3 / mol.