Osmotic pressure ($\pi$ or $\Pi$) is related to the molar concentration ($C$) of the solution by the equation $\pi = CRT$ .

1. Express Concentration ($C$): $C = \frac{n_2}{V}$, where $n_2$ is the number of moles of solute and $V$ is the volume of the solution in litres.
2. Express Moles ($n_2$): $n_2 = \frac{m_2}{M_2}$, where $m_2$ is the mass of the solute and $M_2$ is its molar mass.
3. Substitute into the Osmotic Pressure Equation: $\pi = \frac{m_2}{M_2 V} R T$
4. Rearrange to solve for $M_2$: $M_2 = \frac{m_2 R T}{\pi V}$

This relationship allows for the determination of molar masses of solutes .