a) 250 mL of a 20x stock solution of NaCl is needed to dilute later to a final conc. of 50mM. MW of… Show more a) 250 mL of a 20x stock solution of NaCl is needed to dilute later to a final conc. of 50mM. MW of NaCL is 58.44 how would you accomplish this? Nacl ____ g ( i calculated 14.61g) Pure Water _____ ml ( i calculated 237.5 ml) b) 3.5 ml of 50mM NaCl from your 20x stock how would you get… 20x stock _____ ml? pure water_____ ml c) you need to make 20 ml of a 20% glucose solution. MW of glucose is 180.16 hot would accomplish this? glucose_____ g? pure water______ml? • Show less