А) 2Cu+O2=2CuO
Б) Mg+2HCl=MgCl2+H2
В) 4P+5O2=2P2O5
Г) Ca(OH)2=CaO+H2O
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Answers & Comments
А) 2Cu+O2=2CuO
Б) Mg+2HCl=MgCl2+H2
В) 4P+5O2=2P2O5
Г) Ca(OH)2=CaO+H2O