Need 19 haven’t a clue on what it is

Asolid that forms and separates from a liquid mixture is called

  the mississippians were considered to be  horticulturalists, which means they were

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