1. Ba - Ba(OH)2 - BaSO4 - BaO
2. C - CO2 - H2CO3 - CaCO3 - CO2
3. Cu - CuCL2 - Cu(OH)2 - CuSO4 - Cu - CuO
4. Na - Na2O - NaOH - Na3PO4
Решите пожалуйста эти цепочки ))))
Заранее спасибо )))
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