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Balancing Chemical Equations

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Well, we are doing this in science class, and this "challenger" has stumped me, and I am getting alittle annoyed :-(

 

__KMnO4 + __H2C2O4 + __H2SO4 ---> __K2SO4 + __MnSO4 + __H2O + __CO2

i take it the H2C2O4 is oxalic acid. if it isn't, this doesnt work

2KMnO4 + 5H2C2O4 + 3H2SO4 ---> 1K2SO4 + 2MnSO4 + 4H2O + 10CO2

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