How many mL of 5M NaCl are required to prepare 1500 mL of 0.002 M NaCl? What would be the concentration of the diluted solution from Problem expressed in mM, ?M, and nM? A solution contains 15 g of CaCl2 in a total volume of 190 mL. Express the concentration in terms of g/L, % w/v, M, and mM.