A protein subunit from an enzyme is part of a research study and needs to be characterized. A total of 0.135g of this subunit was dissolved in enough water to produce 2.00 mL of solution. At 28 ∘C the osmotic pressure produced by the solution was 0.138 atm. What is the molar mass of the protein?

Answer 1

pi = MRT
pi = 0.138 atm
M = ?
R = 9.08205 L*atm/mol*K
T = 273.15 + 28 = ?
Solve for M.
Then M = mols/L. You know L and M, solve for mols.
Then mols = grams/molar mass. You know mols and grams, solve for molar mass.

Answer 2

14776