Calculate the molarity of seminormal ${\mathrm{Na}}_2{\mathrm{CO}}_3$ solution. $\mathrm{Na}=23, \mathrm{C}=12$

What is the molality of a solution containing $0.25$ mole of the solute in $250 \mathrm{g}$ of the solvent?

Sp. gr of $\mathrm{HCl}$ solution is $1.17$. $100 \mathrm{g}$ of $\mathrm{HCl}$ solution contains $36.5 \mathrm{g}$ of acid. Calculate the normality of the solution.

When $\mathrm{KCl}$ is dissolved in water, the

An aqueous solution of methanol in water has vapour pressure,

Compared to Jalandhar, the vapour pressure of water at Simla is,

Dissolution of a solid in a solvent