Срочно 70 баллов!!! KI + KNO2 + H2SO4 = I2 + K2SO4 + H2O H2O2 + KMnO4 + H2SO4 =5 O2 + MnSO4 + K2SO4 + H2O FeSO4 + H2O2 + H2SO4 = Fe2(SO4)3 + H2O
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