What is the mole fraction of solute in a 3.84 m aqueous solution?

Answer is: mole fraction of solute is 0,065.

molality (aqueous solution) = 3,84 mol/kg.

Molality i s a measure of the concentration of a solute in a solution in terms of amount of substance in a specified amount of mass of the solvent.

n (solute) = 3,84 mol.

m (solvent-water) = 1 kg = 1000 g.

n (water) = 1000 g : 18 g/mol = 55,55 mol.

mole fraction = 3,84 mol : 3,84 mol + 55,55 mol.

mole fraction = 0,065 = 6,5%.