82. Solving a chemistry problem
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82. Solving a chemistry problem
309. Determine the specific surface area of barium sulfate powder (per unit mass) if its particles settle in an aqueous medium to a height of 0.226 m in 1350 s (ρBaSO4 = 4.5 g/cm3 ρH2O = 1 g/cm3). When calculating, assume that the particles are spherical.
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