42. Solving a chemistry problem
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42. Solving a chemistry problem
13. Determine the molar mass M of the polymer and the second virial coefficient A2 from the following measurements of the osmotic pressure π of the solutions:
Solvent polymer Temperature T, K Osmotic pressure π (Pa) at concentration from solutions
1 kg/m3 2 kg/m3 3 kg/m3 4 kg/m3 5 kg/m3 7 kg/m3
Polymethyl methacrylate 293 24.6 55.8 93.9 138.4 189.0 309.3
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