Answer
We cannot predict the number of lone pairs.
Work Step by Step
As lone pairs will not affect the geometry of the molecule, the molecule could have none or up to four lone pairs.
Chemistry: The Central Science (13th Edition)
by Brown, Theodore E.; LeMay, H. Eugene; Bursten, Bruce E.; Murphy, Catherine; Woodward, Patrick; Stoltzfus, Matthew E.
Published by
Prentice Hall
ISBN 10:
0321910419
ISBN 13:
978-0-32191-041-7
Chapter 9 - Molecular Geometry and Bonding Theories - Exercises - Page 389: 9.13b
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