Answer
62.9296(.6917)+64.9278(.3083) = 63.55amu
Work Step by Step
Multiply atomic masses of isotopes and their respective percentages of abundance and add together. This will give you the average atomic mass of copper
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 75: 2.35
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