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can someone balance this redox please. frustrating because i don't know what else im doing wrong.

C2O4^2- + MnO2 --> Mn^2+ + CO2

my answer is 2C2O4^2- + MnO2 + 4H3O^+ --> Mn^2+ + 4CO2 + 6H2O

im getting mad please help thanks.

Needed to put to lowest coeffecients in this case c2o4 and co2.

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