Answer
6 oxygen atoms.
Work Step by Step
Ca(ClO$_{3}$)$_{2}$ has 6 oxygen atoms because there are 3 oxygen atoms per chlorine, and there are 2 molecules of this compound per 1 molecule of calcium. Thus, 3$\times$2=6.
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 2 - Atoms, Molecules, and Ions - Exercises - Page 76: 2.52b
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