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antoha0306
4FE + 2KNO3 = 2 fe2o3 + N2

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npiecology
2Fe -6 e  =2Fe+3//5   -окисление, восстановитель
2N+5  +10 e=N2//3   - восстановление, окислитель
10 Fe +6KNO3 =5Fe2O3+3K2O +3N2

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