Расставить коэффиценты: 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

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