Chemistry: An Introduction to General, Organic, and Biological Chemistry (12th Edition)

Published by Prentice Hall
ISBN 10: 0321908449
ISBN 13: 978-0-32190-844-5

Chapter 1 - Section 1.4 - Key Math Skills for Chemistry - Questions and Problems - Page 17: 1.17a

Answer

The answer is 23.

Work Step by Step

With two negative signs, the operation becomes addition.
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