Pls ans this question asap

Solution-
1dm³ = 1000 ml
0.3 ​dm³ = 300 ml or in case of water 300 g
$$\begin{gathered} \mathrm{molality} =\frac{\mathrm{mass} \mathrm{of} \mathrm{solute}}{\mathrm{molar} \mathrm{mass} \mathrm{of} \mathrm{solute}}\times \frac{1000}{\mathrm{mass} \mathrm{of} \mathrm{solvent} \mathrm{in} \mathrm{g}} \\ =\frac{0.01}{60}\times \frac{1000}{300}=0.0005 \mathrm{molal} \mathrm{or} 5\times {10}^{-4} \mathrm{molal} \end{gathered}$$