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Автор - nastagubska

Совершить превращение:
1) Cu-CuO-Cu(NO3)2
2) K-K2O-K2SO4

Ответ

Проверено экспертом

Автор - svetka1574
1) 2Cu+O2=2CuO
CuO+2HNO3=Cu(NO3)2+H2O
2) 4K+O2=2K2O
K2O+H2SO4=K2SO4+H2O

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