31. Решение задачки по химии №0212159

87. Calculate the time of settling of sand particles of sizes 10-5 and 10-8 m in water from a height of h = 0.1 m, using the data from problem 77. Assess the sedimentation stability of dispersed systems.
Problem 90.
Using the data from problem 87, calculate and compare the settling time of ammonium chloride aerosol particles from a height of 10 m.

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