₊₁₂Μg ⁾ ⁾ ⁾ 1s² 2s² 2p⁶ 3s²
₂ ₈ ₂
2P + 3Ba = Ba3P2
ZnCl2 + 2NaOH = Zn(OH)2 + 2NaCl
2Li + 2H2O = 2LiOH + H2
<span>А)Сu2+ + </span>S<span>2- = </span>CuS<span> ; </span>Б)Pb(OH)2<span> + </span>2OH<span> - = PbO2</span><span>2- + 2H2O ; </span>
B) CaCO3<span> = CaO + CO2
CaO + 3C = </span>CaC2<span> + CO
CaC2+2H2O=Ca(OH)2+C2H2
C2H2 + H2=C2H4
C2H4+HCl=C2H5Cl
2 C2H5Cl+2Na=2NaCl+C4H10
C4H10=C4H8+H2
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