What is the molal concentration of 0.1 mol/L #"HCN"#?
We have to convert moles of
A concentration of 0.1 mol/L is quite dilute, so I will take the density of the solution as that of water (1 g/mL).
Assume that we have 1 L of 0.1 mol/L
Now, we are ready to calculate the molality of the solution.
Thus, a 0.1000 mol/L solution of HCN has a molality of 0.1003 mol/kg .
Conclusion: If the solution is sufficiently dilute, the molality is almost the same as the molarity.