A) You need to make 250 ml of a 20x stock solution of NaCl to dilute later to a final concentration of 50 mM. The M.W. of NaCl is 58.44. What is amount of NaCl in grams? What is the amount of pure water in milliliters?
B) You need to make 20 mL of a 20% glucose solution. The M.W. of glucose is 180.16. What is the amount of glucose in grams? What is the amount of pure water in milliliters? Please show work for the calculations!