Сбалансируйте уравнения методом полуреакций и методом электронного баланса:

1) KMnO4+H2SO3+H2O2->MnSO4+K2SO4+H2O+O2

2) Ca(MnO4)2+HF->CaF2+MnF2+OF2+H2O

3) FeCr2O7+HI+H2O->Fe(OH)3+Cr(OH)3+I2

4) HNO2+FeCl2+H2SO4->FeCl3+Fe2(SO4)3+N2+H2O

5) PBr3+HNO3+Na2O2->Na3PO4+Br2+NO2+H2O
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