- Please Answer Number 17 And 21 1 (55.48 KiB) Viewed 29 times
please answer number 17 and 21
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please answer number 17 and 21
please answer number 17 and 21
ELI PREPARING AND DILUTING SOLUT 17. How many mL of a 90% ethyl alcohol solution are needed to prepare 150 mL of a 70% ethyl alcohol solution? 18. How many mL of a 1:750 benzalkonium solution are needed to pre- pare 500 mL of a 1:1,000 benzalkonium solution? 19. How many mL of a 6% acetic acid solution are needed to prepare 350 mL of a 2.5% acetic acid solution? 20. How many mL of a 1.2 magnesium sulfate solution are needed to prepare 50 mL of a 15% magnesium sulfate solution? 21. How many mL of a 23.5% sodium chloride (NaCl) solution are needed to prepare 750 mL of a 0.9% NaCl solution?
ELI PREPARING AND DILUTING SOLUT 17. How many mL of a 90% ethyl alcohol solution are needed to prepare 150 mL of a 70% ethyl alcohol solution? 18. How many mL of a 1:750 benzalkonium solution are needed to pre- pare 500 mL of a 1:1,000 benzalkonium solution? 19. How many mL of a 6% acetic acid solution are needed to prepare 350 mL of a 2.5% acetic acid solution? 20. How many mL of a 1.2 magnesium sulfate solution are needed to prepare 50 mL of a 15% magnesium sulfate solution? 21. How many mL of a 23.5% sodium chloride (NaCl) solution are needed to prepare 750 mL of a 0.9% NaCl solution?