131.Solving a chemistry problem

131.Solving a chemistry problem

21 Specific surface of spherical particles of silica hydrosol is: a) 1,1 • 104 m2 / kg; b) 1,1 • 105 m2 / kg; c) 1,1 • 106 m2 / kg. The density of silica is ρ = 2.7 g / cm3; viscosity of the dispersion medium η = 10-3 Pa · s; temperature T = 293 K. Determine the projections of the mean shift of the sol particles for τ = 12 s.

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