503. The enzyme lysozyme (a component of the protein substance of a chicken egg) was studied by membrane osmometry in an aqueous solution of 1.0 mol/l (NH4)2HPO4 (pH 7) at 25 °C with the following results:

s, g/L 4.07 6.18 8.31 10.37 12.37 14.4 16.4 18.41 20.34
p, mm Hg Art. 4.43 6.67 8.83 11.00 13.10 15.13 17.03 18.98 21.00

Determine the molar mass.

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