Answer: Molality of solution is 0.89 mole/kg
Explanation:
Molality of a solution is defined as the number of moles of solute dissolved per kg of the solvent.
[tex]Molarity=\frac{n}{W_s}[/tex]
where,
n = moles of solute
[tex]W_s[/tex] = weight of solvent in kg
moles of nitrobenzene (solute) =[tex]\frac{\text {given mass}}{\text {Molar Mas}}=\frac{1.1}{123.06g/mol}=0.0089[/tex]
mass of napthalene (solvent )= 10.0 g = 0.0100 kg
Now put all the given values in the formula of molality, we get
[tex]Molality=\frac{0.0089}{0.0100kg}=0.89mole/kg[/tex]
Therefore, the molality of solution is 0.89 mole/kg
