Answer
$A)$ $PCl_{5}$
Work Step by Step
The correct name for Phosphorous Pentachloride is $PCl_{5}$ because the first atom in the molecular formula is Phosphorous (P), and since the prefix is "Penta", we know there are 5 chlorine atoms.
Chemistry (4th Edition)
by Burdge, Julia
Published by
McGraw-Hill Publishing Company
ISBN 10:
0078021529
ISBN 13:
978-0-07802-152-7
Chapter 2 - Key Skills Problems - Page 74: 2.4
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