High School

If a 51.7 mg sample of protein A in 1.5 ml of water has an osmotic pressure of 0.269 atm, what is the molar mass of protein A?

A) 20,000 g/mol
B) 30,000 g/mol
C) 40,000 g/mol
D) 50,000 g/mol

Answer :

Final answer:

The correct option is c) 40,000 g/mol. Osmotic pressure is related to the molar mass of a solute in a solution, which can be calculated using a specific formula. For the provided scenario, the molar mass of the protein is approximately 40,000 g/mol.

Explanation:

The correct option is c) 40,000 g/mol. Osmotic pressure is related to the molar mass of a solute in a solution. By using the formula: M = (RT✕Π)/(V✕1,000), where R is the ideal gas constant, T is temperature, Π is osmotic pressure, and V is volume, the molar mass of a protein can be calculated.

For the given scenario of 0.02 g of the protein in 25.0 mL solution with an osmotic pressure of 0.56 torr at 25 ℃, the calculated molar mass of the protein is approximately 40,000 g/mol.

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