146. Solving a chemistry problem

15. Calculate the value of the osmotic pressure of the smoke in open-hearth furnaces at C = 1.5 × 10 -3 kg / m 3. The average radius of the aerosol particles is r = 2 · 10 -8 m; density ρ = 2.2 · 10 3 kg / m 3; T = 293 K.