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Zn
0
+2
2+
H+
1
1+
+1
Fe2+
O2-
-2
2-
NH4+
-3
+3
+5
SO42-
-8
+6
+8
N3-
C
+4
4+
Al --> Al3+
+3 --> 0
0 --> +3
0 --> 3+
2Cl- --> Cl2
0 --> -1
-1 --> -1
-1 --> 0
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