27. The reactions are expressed in patterns NaCrO2 + Br

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27. The reactions are expressed in patterns
NaCrO2 + Br2 + NaOH → NaBr + Na2CrO4 + H2O
FeS + HNO3 → Fe (NO3) 2 + S + NO + H2O
Make a electronic equation. Arrange the the coefficients in the equations of reactions. For each reaction, specify the, what substance is an oxidant, what - a reducing agent; what substance is oxidized, what - is restored

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Detailed solution. Decorated in Microsoft Word 2003. (Target decided to use formula editor)

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