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Chemistry
Chemistry
Problem
Magnetite has the formula
Fe
3
O
4
\text{Fe}_3\text{O}_4
Fe
3
O
4
. If the oxidation number of oxygen is
−
2
-2
−
2
, what is the average oxidation number of iron in
Fe
3
O
4
\text{Fe}_3\text{O}_4
Fe
3
O
4
? a)
+
2
+2
+
2
b)
+
7
3
+\dfrac{7}{3}
+
3
7
c)
+
8
3
+\dfrac{8}{3}
+
3
8
d)
+
3
+3
+
3
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