Chemistry 12th Edition

Published by McGraw-Hill Education
ISBN 10: 0078021510
ISBN 13: 978-0-07802-151-0

Chapter 2 - Atoms, Molecules, and Ions - Questions & Problems: 2.43

Answer

Please see the work below.

Work Step by Step

We know that a. Sodium ion has +1 charge while oxide has -2 charge so the correct formula is $Na_2O.$ b. Iron ion has +2 charge while sulfide has -2 charge so the correct formula is $FeS.$ c. CO ion has +3 charge while $SO_4$ has -2 charge so the correct formula is $CO_2(SO_4)_3.$ d. Barium ion has +2 charge while fluoride has 1 charge so the correct formula is $BaF_2.$
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