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16 questions
Oxidation number of O in the compound H2O2:
0
-1
-2
+2
Oxidation number of Fe in Fe2O3:
0
-2
+2
+3
Oxidation number of H in NaH:
0
+1
-1
+2
What is the oxidation state of vanadium in V(H2O)63+
1+
3+
5+
7+
What is the oxidation state of phosphorous in Mg3(PO4)2
+2
+3
+4
+5
What is the oxidation state of H in H2?
+2
+1
0
None of the above
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