a)<span>4Na + O2 = 2Na2O
</span> Na20+H2O= 2Na(OH)
<span>NaOH+HCl=NaCl+H2O
</span> b)S+O2->SO2
SO3+H2O->H2SO4
<span>H2SO4+2KOH->K2SO4+2H2O
</span>c)2Са+О2=2СаО
СаО+Н2О=Са (ОН) 2
<span>Са (ОН) 2+СО2=СаСО3+Н2О
d)</span>4Al+3O2=2Al2O3
Al2O3 + NaOH = Al(OH)3 + Na2O
Al(OH)3 + H2SO4 = Al(SO4)3 + H2O
<span>CH2=CH-CH3 + H2 -----------> CH3-CH2-CH3</span>
2Сa + O2 = 2CaO
S + O2 = SO2
2CO + O2 = 2CO2
4Fe + 3O2 = 2Fe2O3
2H2S + 3O2 = 2SO2 + 2H2O
2SO2 + O2 = 2SO3
4Al + 3O2 = 2Al2O3
1)4Аl + 3О2 = 2Аl2О3 2)Аl2О3 + 6НCl = 2АlСl3 + 3Н2О 3) АlСl3 + 3NаОН = АlOН3 + 3NаСl
по формуле: M(Br2)/M(CaBr2)*100\%