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2.2 dau funda si 15 puncte urgentttt

22 Dau Funda Si 15 Puncte Urgentttt class=

Răspuns :

Zn + 2HCl = ZnCl2 + H2

Ca + 2H 2O= Ca(OH)2 + H2

CuSO4 + 2NaOH = Cu(OH )2 +Na2SO4

4Al +3 O2 = 2Al2O3