140. Задачка по химии №014 071

In the study by the method of flow ultramicroscopy in a volume of V = 2 * 10-11 m3, 100 particles of sulfur sol were counted. Sol concentration c = 6.5 * 10-5 kg / m3, density p = 1 * 103 kg / m3. Calculate the average radius of the particles, taking their shape as spherical.

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