Chemistry: Principles and Practice (3rd Edition)

Published by Cengage Learning
ISBN 10: 0534420125
ISBN 13: 978-0-53442-012-3

Chapter 2 - Atoms, Molecules, and Ions - Questions and Exercises - Exercises - Page 87: 2.92

Answer

(a) (1 x 23) + (1 x 16) + (1 x 1) = 40 u (b) (39.098 x 2) + (1 x 12) + (16 x 3) = 138.196 u (c) (3 x 40.078) + (30.974 x 2) + (16 x 8) = 310 u

Work Step by Step

We find, using the atomic masses on the periodic table: (a) (1 x 23) + (1 x 16) + (1 x 1) = 40 u (b) (39.098 x 2) + (1 x 12) + (16 x 3) = 138.196 u (c) (3 x 40.078) + (30.974 x 2) + (16 x 8) = 310 u
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