0732. Solving a chemistry problem

9. Using the Smoluchowski equation, calculate and plot in coordinates n=f(t) a curve of changes in the total number of particles n of the coagulating sulfur hydrosol. The average radius of sol particles before the start of coagulation is r=1•10-8 m, the mass concentration of particles in 1 m3 is 6.5•10-3 kg, the density is 0.9•103 kg/m3. Viscosity of the medium at 295 K η=1•10-3 N•s/m2. To build a graph, take intervals: 1, 2, 4, 10 and 20 s.