Define the following terms:
(i) Mole fraction (x)
(ii) Molality of a solution (m)

Explanation

(i) N/A
(ii) Molality: it is the number of moles of the solute dissolver per kilogram (kg) of the solvent. It is denoted by m.
`therefore"Molality (m)"=("Moles of solute")/("Mass of solvent in kg")`
`therefore" m"=(w_(2)xx1000)/(M_(2)xxw_(1))`
where `w_(1)`=Mass of solvent, `w_(2)`=Mass of solute and `M_(2)`=Molar mass of solute.