Which of the following concentration factors changes with temperature?

An aqueous $KCl$ solution of density $1.20 \ g \ mL^{-1}$ has a molality of $3.30 \ mol \ kg^{-1}$. The molarity of the solution in $mol \ L^{-1}$ is ..... . (Nearest integer)
[Molar mass of $KCl = 74.5 \ g \ mol^{-1}$]

$A$ solution of $H_2O_2$ used for hair bleaching contains approximately $5.0 \ g$ of $H_2O_2$ per $100 \ mL$ of solution. If the molar mass of $H_2O_2$ is $34 \ g/mol$,what is the molarity of this solution?

Calculate the molarity $(M)$ of a $63 \% \ w/w$ $HNO_3$ solution if the density is $5.4 \ g/mL$.

What is the mole fraction of the solute in a $1.00 \, m$ aqueous solution?

$A$ $2.0 \, M$ solution is obtained when $0.5 \, mole$ of solute is dissolved in: