Answer
$Mg(ClO_4)_2$
Work Step by Step
We know that $ClO_4$ has a -1 charge and that Mg has a +2 charge. Thus, to write the formula for the compound, pick the smallest ratio of the cation and the anion that will make the overall molecule neutral.
Chemistry: The Molecular Science (5th Edition)
by Moore, John W.; Stanitski, Conrad L.
Published by
Cengage Learning
ISBN 10:
1285199049
ISBN 13:
978-1-28519-904-7
Chapter 2 - Chemical Compounds - Questions for Review and Thought - Topical Questions - Page 90b: 45c
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