What is the mole fraction of solute in a 3.19 m aqueous solution?

Molality = mol / Kg

if we assume that we have 1 kg of water, we have 3.19 moles of solute.

the formula for mole fraction - - > mole fraction = mol of solule / mol of solution

1) if we have 1 kg of water which is same as 1000 grams of water.

2) we need to convert grams to moles using the molar mass of water

molar mass of H₂O = (2 x 1.01) + 16.0 = 18.02 g/mol

1000 g (1 mol / 18.02 grams) = 55.5 mol

3) mole of solution = 55.5 moles + 3.19 moles = 58.7 moles of solution

4) mole fraction = 3.19 / 58.7 = 0.0543