Question

A solution contains 0.02755 g of a protein in 25.0 mL of solution. The osmotic pressure is 3.22 torr at 298 K. What is the molecular weight of the protein?
pi = ZMRT.
pi should be in atm (3.22/760).
T must be in kelvin. Solve for M in mols/L. Then moles = grams/molecular weight.. You know grams and mols, solve for molecular weight.
How do I find mols?

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