Подставьте коэффициенты в уравнения окислительно-восстановительных реакций a)H2O2+KMnO4+H2SO4>>K2SO4+MnSO4+O2+H20
b)H2S+KMnO4+H2SO4>>S+MnSO4+K2SO4+H2O
c)MnO2+HCl=MnCl2+Cl2+H2O
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