72. Solving a chemistry problem

14. How many times will the total number of particles v of the smoke of open-hearth furnaces decrease after 1,10,100 s after the start of coagulation? Average particle radius 20 nm, concentration 1*10-3 kg/m3, particle density 2.2 g/cm3. The fast coagulation constant, according to Smoluchovsky, is 3*10-16 m3/s.