The mole fraction of glucose is aqueous solution is 0.2, then molality of solution will be__?

Let us consider a 1 mole of a solution

        Number of moles of glucose = 0.2

        Number of moles of water = 0.8

        Weight of water = $0.8\times 18 =14.4$

$molality=\frac{numberofmolesofsolute}{weightofsoluteinkg}$

                    $=\frac{0.2}{14.4\times {10}^{-3}}=13.8$