Answer
The formula is CrH$_{2}$.
Work Step by Step
The formula is CrH$_{2}$ because there are twice as many tetrahedral holes as metal atoms and all of the tetrahedral holes are filled (occupied).
Chemistry: A Molecular Approach (3rd Edition)
by Tro, Nivaldo J.
Published by
Prentice Hall
ISBN 10:
0321809246
ISBN 13:
978-0-32180-924-7
Chapter 23 - Sections 23.1-23.5 - Exercises - Problems by Topic - Page 1095: 41b
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