025 G of a Protein Is Added to 250 Cm³

0.25 g of a protein is added to 250 cm³ water at 298 K and the osmotic pressure is measured as 320 Pa. Estimate the relative molecular mass of the protein.

A) Approx 4,000 g mol⁻¹
B) Approx 22,000 g mol⁻¹
C) Approx 7700 g mol⁻¹
D) Approx 13,500 g mol⁻¹