Answer: A protein has been isolated as a salt with the

Chapter 12, Problem 12.97

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A protein has been isolated as a salt with the formula Na20P (this notation means that there are 20 Na1 ions associated with a negatively charged protein P202). The osmotic pressure of a 10.0-mL solution containing 0.225 g of the protein is 0.257 atm at 25.0C. (a) Calculate the molar mass of the protein from these data. (b) Calculate the actual molar mass of the protein.

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