What is the volume of a marble that has a mass of 3.g and a Density of 2.7 g/ml ? make sure to round to the nearest tenth

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