Question

Mole fraction of a solute in 2.5 molal aqueous solution is :

(A) 0.43 (B) 0.043

(C) 4.3 (D) 43

Answer 1

Molality = 2.5 m

Hence, 2.5 moles of solute are present in 1000g of solvent (Water)

Hence, Mole Fraction = 2.5/2.5+55.55 (We know that no of moles of pure water is 55.55)

== Mole Fraction = 0.43

So, Correct Option is (A) 0.43

Answer 2

(B) 0.043 is correct

Hope this may help you .....❤❤