Question

La primul ex e enuntul :Stabiliti coeficentii urmatoarelor ecuatii..
CELE INCERCUITE

Answer 1

la k nu trebuie coeficienti
EXERCITIUL 13:
2NaCl+H2SO4=Na2SO4+2HCl
AgNO3+HCl=AgCl+HNO3
4Al+3O2=2Al2O3
Mg(OH)2+H2SO4=MgSO4+2H2O
Ca+H2SO4=CaSO4+H2
 sper ca te-am ajutat
exercitiul 12 ti l-am rezolvat in cealalta intrebare

Answer 2

2PbO2 -> 2PbO + O2
CaO + H2O -> Ca(OH)2 nu are nevoie de egalare e deja egalata
12.
a)2H2 + O2 -> 2H2O
b)H2 + F2 -> 2HF
c)HF + NaOH -> NaF + H2O
d)FeCl3 + 3KOH -> 3KCl + Fe(OH)3
e)2Al + 3Cl2 -> 2AlCl3
f)2HgO -> Hg + O2
g)CaCl2 + 2HNO3 -> Ca(NO3)2 + 2HCl
h)Ca + 2H2O -> Ca(OH)2 + H2
i)Fe2(SO4)3 + 3BaCl2 -> 3BaSO4 + 2FeCl3
j)N2 + 3H2 <=> 2NH3
13.
a)2NaCl + H2SO4 -> Na2SO4 + 2HCl
b)AgNO3 + HCl -> AgCl + HNO3
c)4Al + 3O2 -> 2Al2O3
d)Mg(OH)2 + H2SO4 -> MgSO4 + 2H2O
e)Ca + H2SO4 -> CaSO4 + H2