146. Solving a chemistry problem
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Product description
25 When calculating the number of selenium hydrosol particles at two levels, located at a distance of 100⋅10-6 m, 733 particles were found on the lower level, and 444 at the upper level. The density of selenium is 4.27 g / cm3; water density 1 g / cm3; Experimental temperature T = 292 K. Calculate the average particle diameter of selenium.
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