117. Solving a chemistry problem
618. In the study of the smoke of an open-hearth furnace by the Deryagin-Vlasenko flow ultramicroscopy, an average of 80 particles were found in a volume of 2.00 * 10-5 cm3, which passed through the counting field of the microscope. Calculate the radius of the sol particles, knowing its concentration is 100 mg/m3 and the density of the substance is 3.28 g/cm3.
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