A solution of potassium iodide at 70° C contains 200 g of dissolved solute in
100 cm 3 water. The solution is allowed to cool. At what new temperature
would crystals begin to start forming?

In a laboratory, 1.55mg of an organic compound containing carbon, hydrogen, and oxygen is burned for analysis. this combustion resulted in the formation of 1.45mg of carbon dioxide and .89 mg of water. what is the empirical formula for this compound?

Once similarity and one difference between a mixture of elements and a mixture of compounds

Arectangle has a diagonal 20 inches long that forms angles of 60 and 30 with the sides. find the perimeter of the rectangle. for geometry