9. Determine the molecular weight of polystyrene in toluene using the experimental data of the viscometric method

Solution concentration С, kg/m3 0.0 1.70 2.12 2.52 2.95 3.40
Solution and solvent outflow time, t, s 97.6 112.6 120.0 124.5 129.6 135.0
Constants: K=1.7*10-5, a=0.69

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