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?
H
2
+
?
K
Mn
O
4
+
?
K
N
O
2
+
?
H
2
S
O
4
→
?
Mn
S
O
4
+
?
K
N
O
3
+
?
K
2
S
O
4
+
?
H
2
O
Error: Error in balancing the equation: There is an infinite amount of solutions.