27. Solving a chemistry problem

8. In an experiment on sedimentation equilibrium, the following data were obtained for a certain protein: ω = 19000 rpm; s=2.15*10-13sv; v=0.71 ml/g; ρ=1.1 g/ml. The relative concentrations of the protein at distances r1 and r2 from the center of rotation are equal: c1 = 4.72 (r1 = 5.95 cm) and c2 = 12.98 (r2 = 6.23 cm) What is the molecular mass of the protein?