329. Based on the osmometric data obtained at a given temperature T, calculate the molar mass of polyvinyl chloride in cyclohexane. R = 8.31*103 J/K*kmol; [M] = kg/kmol or g/mol.

T,K Concentration, kg/m3 Osmotic pressure, N/m2
C1 C2 C3 C4 C5 π1 π2 π3 π4 π5
295 2 5.5 8 10.5 16.5 33.2 97.9 149.6 204.8 356.4

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