Question

The mole fraction of the solute in one molar aqueous solution is
A)0.027
B)0.036
C)0.018
D)0.009

Answer 1

Molality of solution = Mole of solute per kg of solvent                

So 1 m = 1 mole of solute per 1000 g of solvent                

Hence, moles of solute in 1 m aqueous solvent = 1                

moles of solvent in 1 m aqueous solution   =1000/18=55.55              

 Mole fraction of solute in 1 m solution                 =1/1+55.55=1/56.55=0.0176≈0.018

Answer 2

so your answer is c) 0.018