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# 100 mg of a protein is dissolved in just enough water to make 10.0 mL of solution. If this solution has an osmotic pressure of 13.3mm Hg at $25^{\large\circ}$C, what is the molar mass of the protein?(R = 0.0821 L atm $mol^{−1}K^{−1}$ and 760 mm Hg = 1 atm)

$13980.45gmol^{-1}$
Hence (A) is the correct answer.