Question

formula of relation between molefraction and molality​

Answer 1

$\bf\large\underline\pink{Answer:-}$

Molality is moles of solute per kilogram of solvent. So to get from mole fraction to molality, the easiest way is to assume that you have one total mole. Then the numerator of the molality is just X(solute) and the denominator is X(solvent) converted to kilograms.