va rog ajutatima cu exercitiu!! rezolvatil corect!dau coroana!!! puneti si coeficienti corect pls
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a) 3NaCl + Al(OH)₃
b) Pb(OH)₂ + NaNO₃
c) ZnCl₂ + Ca(OH)₃
d) Fe(OH)₂ + CaSO₄
e) MgCl₂ + 2 H₂O
f) KCl + NH₄OH