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indicati valentele si dendenumiti:
CH. FeNo3
CuOH. PbOH
FeOH CrOH
ZnOH. HCO3


Răspuns :

CH₄ Fe(NO₃)₂
Cu(OH)₂. Pb(OH)₃
Fe(OH)₂ Cr(OH)₂
Zn(OH). HCO3