19. Решение задачки по химии №48

3. Observing the diffusion-sedimentation equilibrium of selenium hydrosol particles at 293 K, it was discovered that with a density difference of 50 µm, one of them had 839 particles, and the other 580. The density of selenium is 4.7 g/cm3, the diameter of the particles is 120. Find what value of Avogadro´s number was obtained in this experiment.

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