July 2022 1 2 Report
Методом электронного баланса подберите коэффициенты в схеме окислительной восстановительной реакции, укажите окислитель и восстановитель
H2S+K2Cr2O7+H2SO4--->S+Cr2(SO4)3+K2SO4+H2O
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