Question

An aqueous solution contains 0.87 g/L of an organic compound. The osmotic pressure of
this solution is 83 mmHg at 29°C. What is the molar mass of the solute?

Answer 1

P=83mmHg

T=302.15k

C=0.87g/L

$PV=RT$

V=(8.314*302.15)/83=30.26cm3

$M= C*V$

m=0.87*30.26=26.33g