Chemistry: The Central Science (13th Edition)

Published by Prentice Hall
ISBN 10: 0321910419
ISBN 13: 978-0-32191-041-7

Chapter 2 - Atoms, Molecules, and Ions - Exercises - Page 75: 2.38b

Answer

This number represents the average atomic mass of chlorine.

Work Step by Step

There are other isotopes of Cl that are both higher and lower than 35.5 amu, but when they are averaged together with their respective percent abundances, the result is the average atomic mass of 35.5 amu.
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