#### 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.

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Published by
McGraw-Hill Publishing Company

ISBN 10:
0078021529

ISBN 13:
978-0-07802-152-7

$A)$ $PCl_{5}$

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