heei rezolvati-mi si mie problema aceasta dau coroana si 10 puncte
•Stabiliti coeficientii urmatoarelor ecuatii:
•3Fe+2O2-> Fe3O4
•Na+H2O->NaOH+H2
•Al(OH)3+HNO3->Al(NO3)3+H2O
•Al+S->Al2S3
•Fe+Cl2->FeCl3
•Ca(OH)2+H2SO4->CaSO4+H2O
•NaOH+HCl->NaCl+H2O
•Al+O2->Al2O3->CH4
•C+H2