Укажите реакцию, которая практически осуществима:
1)Na+ O2=
2)Au+ O2=
3)Cu+ H2O=
4)Cu+ HCl=
1)Na+ O2=
2)Au+ O2=
3)Cu+ H2O=
4)Cu+ HCl=
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Otvet:1) 2Na + O₂ = Na₂O₂
2)Au+O2>AuO
3)Cu+H2O>Cu(OH)2+H2
4)Cu+HCl>CuCl2+H2