Chemistry 12th Edition

Published by McGraw-Hill Education
ISBN 10: 0078021510
ISBN 13: 978-0-07802-151-0

Chapter 3 - Mass Relationships in Chemical Reactions - Questions & Problems: 3.20

Answer

Please see the work below.

Work Step by Step

We can find the number of copper atoms in a modern penny as follows $0.63g\space Cu\times (\frac{1 mol \space Cu }{63.55g\space Cu})(6.022\times 10^{23}Cu \frac{atoms}{1mol\space Cu})=6.0\times 10^{20}Cu\space atoms$
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