September 2021 0 6 Report
Очень срочно нужно расставить коэффициенты методом электронного баланса: 1) MnSO4+KMnO4+KOH=K2MnO4+K2SO4+H2O; 2) NaCrO2+Br2+NaOH=NaBr+Na2CrO4+H2O; 3) FeS+HNO3=Fe(NO3)+S+NO2+H2O; 4) FeSO4+HNO3+H2SO4+NO+N2O.
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