88. Solving a chemistry problem
515. Determine the molar mass of a sample of nitrocellulose from the following data on the dependence of the osmotic pressure of its solution in nitrobenzene on concentration at 20 ° C:
s, g/l 1.20 2.78 5.01 9.98 15.7
π, Pa 25.0 64.1 108 216 334
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