Introductory Chemistry (5th Edition)

Published by Pearson
ISBN 10: 032191029X
ISBN 13: 978-0-32191-029-5

Chapter 2 - Measurement and Problem Solving - Exercises - Problems - Page 52: 96

Answer

No, it is not pure copper.

Work Step by Step

Mass = 2.49g Volume = $0.349 cm^{3}$ Density = $\frac{Mass}{Volume} = \frac{2.49g}{0.349cm^{3}} = 7.13 g/cm^{3}$ Density of the penny $\ne$ Density of copper (8.96 $g/cm^{3}$) Hence, the penny is not pure copper.
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