Расставить коэфициенты fe +o2=feo al+o2=al2o3 zno +hcl=zncl2+h2o mg+n2=mg3n2 al(oh)3 =al2o3+h2o h2+p=ph3 h2+c=ch4 cu(oh)2=cuo+h2o h2o+so3=h2so4 na2o+h2o=naoh zn+hcl=zncl2+h2 mg+hcl=mgcl2+h2 al+hcl=alcl3 +h2 fe+cl2=fecl3 mg+fe2o3=mgo + fe k+h2o =koh +h2 s+o2= so3

Fe+Cl2=FeCl3
Mg+Fe2O3=MgO + Fe
K+H2O =KOH +H2
S+O2= SO3
2Fe +O2=2FeO
4Al+3O2=2Al2O3
ZnO +2HCl=ZnCl2+H2O 
3Mg+N2=Mg3N2
2Al(OH)3 =Al2O3+3H2O
3H2+2P=2PH3
2H2+C=CH4
Cu(OH)2=CuO+H2O
H2O+SO3=H2SO4
Na2O+H2O=2NaOH
Zn+2HCl=ZnCl2+H2
Mg+2HCl=MgCl2+H2
2Al+6HCL=2AlCl3 +3H2
2Fe+3Cl2=2FeCl3
3Mg+Fe2O3=3MgO + 2Fe
K+H2O =KOH +H2
2S+3O2= 2SO3