KMnO4 +HCl-->MnCl2+Cl2+H2O+KCl
km is +8 because oxygen is -2 time 4 because there are four of them, so O is -8
H is +1=as rule, so cl=-1 as charge.
Mn becomes +2 because Cl=-1 times two.
Cl2 is 0 because it's a diatomic element by itself
H=+1 while o=-2
K =+1 while Cl=-1
did that help
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