Например так:
2Fe(OH)3 + 3H2SO4 = Fe2(SO4)3 + 6H2O
N2+3H2=2NH3
NH3+HCL=NH4CL
NH4CL+NaOH=NH4OH+NaCL
2NH4OH+H2SO4=(NH4)2 SO4+2H2O
(NH4)2SO4 +BaCL2=BaSO4+2NH4CL
N(Al)=54/27=2 моль 4Al+3O2=2Al2O3 nAl:nAl2O3=2:1 n(Al2O3)=1мольm m(Al2O3)=1*102=102 г
<span>1)С3Н4 + 2Р2 = С3H8</span>
<span>2)C3H4 + 2Br2 =C3н4Br4</span>
<span>3)C3H4 + 2HBr = C3н4Br2</span>