What will be the mass of the solute in $g$ in $1 \, L$ of a solution having $40 \%$ concentration by weight? The density of the solution is $1.2 \, g/mL$.

Mole fraction $(X)$ of any solution is equal to

$250 \ g$ solution of $D$-glucose in water contains $10.8 \ \%$ of carbon by weight. The molality of the solution is nearest to (Given: Atomic weights are $H = 1 \ u, C = 12 \ u, O = 16 \ u$)

If the density of a $2 \ M$ solution of ethylene glycol in water is $1.11 \ g/mL$, the molality (in $m$) of the solution is approximately

Calculate the molarity of $NaOH$ in the solution prepared by dissolving $4 \,g$ of it in enough water to form $250 \,mL$ of the solution. (in $,M$)

The $\% \ w/V$ unit is used in which branch of science?