The density of ' x ' M solution (' x ' molar) of NaOH is 1.12 g mL^-1, while in molality, the concentration of the solution is 3 m ( 3 molal). Then x…

The density of ' $\displaystyle x$ ' M solution (' $\displaystyle x$ ' molar) of NaOH is $\displaystyle 1.12 \mathrm{~g} \mathrm{~mL}^{-1}$, while in molality, the concentration of the solution is $\displaystyle 3$ m ( $\displaystyle 3$ molal). Then $\displaystyle x$ is (Given : Molar mass of NaOH is $\displaystyle 40 \mathrm{~g} / \mathrm{mol}$ )