What happened to the freezin point of the water once salt is added

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

How is the way a mixture is combined different from how a compound is combined?

The limiting reactant(s) appeared to be