October 2021 0 5 Report
Отметьте реакцию сообщения: а) 2KMnO4 = K2MnO4 + MnO2 + О2 ↑; б) 2Са + O2 = 2 СаО;
в) 2KNO3 = 2KNO2 + О2 ↑; г) KCl + AgNO3 = AgCl ↓ + KNO3.
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