KMnO4+C2H2+H2SO4=K2So4+MnSO4+CO2+H2O
Сl2+Br2+NaOH=NaCl+NaBrO3+H2O
C4H8O+H2SO4+KMnO4=CO2+K2SO4+MnSO4+H2O
Расставьте коэффициенты методом электронного баланса.
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