Chemistry: The Molecular Science (5th Edition)

Published by Cengage Learning
ISBN 10: 1285199049
ISBN 13: 978-1-28519-904-7

Chapter 13 - The Chemistry of Solutes and Solutions - Exercise 13.10 - Bottled Water as a Magnesium Source - Page 580: a

Answer

13 bottles per day.

Work Step by Step

500 mL bottle contains 12 mg magnesium. 500mL$\times$2=1000 mL=1 L bottle contains $12mg\times2=24\,mg $ magnesium. Recommended daily allowance=320 mg Number of bottles to drink to obtain recommended daily allowance of magnesium=$\frac{320\,mg/day}{24\,mg/bottle}$=13 bottles per day.
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