What is the molarity of the following solution given: 1.0 moles of potassium fluoride (KF) is dissolved to make 0.10 L of solution

Which aqueous solution of ki freezes at the lowest temperature? 1) 1 mol of ki in 500. g of water 2) 2 mol of ki in 500. g of water 3) 1 mol of ki in 1000. g of water 4) 2 mol of ki in 1000. g of water