Answer
$Cr_{2}O_{3}$
Work Step by Step
Valency of Oxygen is -2 and Chromium is +3 (as it is Chromium(III)), hence the formula will be $Cr_{2}O_{3}$
Chemistry: An Introduction to General, Organic, and Biological Chemistry (12th Edition)
by Timberlake, Karen C.
Published by
Prentice Hall
ISBN 10:
0321908449
ISBN 13:
978-0-32190-844-5
Chapter 6 - Section 6.3 - Naming Ionic Compounds - Study Check 6.6 - Page 176: 1
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