An aqueous solution of sodium iodide has a concentration of 0.459 molal. The percent by mass of sodium iodide in the solution is An aqueous solution is 3.50% by mass potassium bromide, KBr, and has a density of 1.02 g mL. The molality of potassium bromide in the solution is m. An aqueous solution is 36.0% by mass potassium bromide, KBr, and has a density of 1.33 g mL. The molality of potassium bromide in the solution is m.