1,2,3 pleasee i need to pass this class

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. 9 more group attempts remaining An aqueous solution of copper(II) nitrate has a concentration of 0.285 molal. The percent by mass of copper(II) nitrate in the solution is % An aqueous solution is 18.0% by mass ammonia, NH3, and has a density of 0.929g/mL. The molality of ammonia in the solution is m. 9 more group attempts remaining