The mole fraction of the solute in a $1 \ m$ (molal) aqueous solution is:

Calculate the mass of urea $(NH_2CONH_2)$ required in making $2.5 \, kg$ of $0.25 \, \text{molal}$ aqueous solution.

The mole fraction of glucose $(C_{6}H_{12}O_{6})$ in an aqueous binary solution is $0.1$. The mass percentage of water in it,to the nearest integer,is $....$.

If $80 \ g$ of $NaOH$ is mixed with $54 \ g$ of water to form a solution,calculate the mole fraction of water.

What is the meaning of concentration of a solution? Discuss the different ways to express the concentration of solutions.

The density of $NH_4OH$ solution is found to be $0.6 \, g/mL$. It contains $35 \%$ by mass of $NH_4OH$. The normality of the solution is ......... $N$.