Chemistry: The Central Science (13th Edition)

by Brown, Theodore E.; LeMay, H. Eugene; Bursten, Bruce E.; Murphy, Catherine; Woodward, Patrick; Stoltzfus, Matthew E.

Published by Prentice Hall

ISBN 10: 0321910419

ISBN 13: 978-0-32191-041-7

Chapter 3 - Chemical Reactions and Reaction Stoichiometry - Exercises - Page 114: 3.25d

Answer

28.82%

Work Step by Step

The percentage of oxygen in the substance is determined by the following equation: $\%O = \frac{8\times16}{444}\times100\%= 28,82%$ Knowing that, 8 = number of oxygen atoms. 16 u = atomic mass of oxygen. 444 u= molecular mass of tetracycline

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