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1) Fe+3 is reduced and C is the reducing agent
C0 is oxidized and Fe2O3 is the oxidizing agent
Coefficients for balanced chemical reaction: 2,3,4,3.
2) Cu+2 is reduced and H2 is the reducing agent
H2 is oxidized and CuO is the oxidizing agent
Coefficient for balanced chemical reaction: 1,1,1,1
3) Not Redox Reaction
4) Cl02 is reduced and CaBr2 is the reducing agent
Br-1 is oxidized and Cl2 is the oxidizing agent
Coefficient for balanced chemical reaction: 1,1,1,1