46. Solving a chemistry problem

5. Calculate the total number of particles n in the coagulation of the mineral oil mist for the following time intervals: 60, 120, 240, 480 and 600 s. The average particle radius is r = 2*10 -7 m, the mass concentration of particles in 1m3 is 25*10-3 kg, the density of particles is ρ = 0.97*103 kg/m3. The half coagulation time is 240 s. Plot the curve of change in the total number of particles in the coordinates n=f(t).