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 77: 2.73d



Work Step by Step

First, look at the charges of the ions in Zinc Nitrate. The Zinc ion has a charge of 2+. On the other hand, Nitrate $(NO_3)-$, has a charge of 1-. This -1 charge is only half the magnitude of the charge of Zinc, which is 2+. This means that in the chemical formula, there must be two Nitrate ions for every one Zinc ion. Metals come first in the chemical formula, so the formula for Zinc Nitrate is $Zn(NO_3)_2$.
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