Question

how to calculate atomic concentration and mass concentration

Answer 1

Divide the mass of solute in the solution its formula mass. If, for instance, the solution contains 100 g of potassium chloride -- 100 ÷ 74.55 = 1.32 moles. Divide the number of moles by the volume of solution in liters (L). If, for instance, the solution is 1.5 L -- 1.32 ÷ 1.5 = 0.88.