51. Solving a chemistry problem

93. Using the equation of sedimentation-diffusion equilibrium, calculate the height at which the concentration of Al2O3 particles with a radius of r = 1 10-8m will be half that at the bottom of the vessel. Temperature T=293 K; density of the dispersed phase ρ = 4.0 103 kg/m3; density of the dispersion medium ρо = 1 103 kg/m3.