15. How much 10% w/ NaCl solution can be made using 30 g of NaCL? 16. How many grams of NaCl will be needed to make 500 g of a 15% w/w NaCl solution? 17. If you had 5 moles in 500 mL of solution, what is the molarity? 18. Determine the molarity of 2.5 moles NaCl in 3 Lof solution. 19. What is the % w/v of solution that has 15 g of NaCl dissolved into a total volume of 100 mL water? 20. How much of a 25 M stock solution would be needed to produce 500 mL of a 10 M solution