Chemistry (7th Edition)

Published by Pearson
ISBN 10: 0321943171
ISBN 13: 978-0-32194-317-0

Chapter 2 - Atoms, Molecules, and Ions - Worked Example - Page 52: 9

Answer

The atomic weight of copper is equal to $63.55$; This is the same value that appears on the periodic table.

Work Step by Step

Remember, 100% represents 1.00, which means that 69.15% represents 0.6915, and 30.85%, 0.3085. Atomic weight = (62.93)(0.6915) + (64.93)(0.3085) = $63.55$
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