Pure water can be obtained from sea water by

Osmotic pressure is $0.0821 \ atm$ at a temperature of $300 \ K$. Find the concentration in $mol/L$.

What is a semi-permeable membrane? Give examples.

Give an example of a material used for making a semipermeable membrane for carrying out reverse osmosis.

Which of the following colligative properties can provide the molar mass of proteins,polymers,and colloids with greater precision?

At $27^{\circ}C$,a solution containing $2.5 \ g$ of solute in $250.0 \ mL$ of solution exerts an osmotic pressure of $400 \ Pa$. The molar mass of the solute is $.............. \ g \ mol^{-1}$ (Nearest integer) (Given: $R = 0.083 \ L \ bar \ K^{-1} \ mol^{-1}$)