Em tham khảo!

$\text{a) 4FeS2+11O2$\xrightarrow{t^o}$2Fe2O3+8SO2}$

Tỉ lệ: $\text{4:11:2:8}$

$\text{b) Na2SO3+H2SO4$\rightarrow$Na2SO4+H2O+SO2}$

Tỉ lệ: $\text{1:1:1:1:1}$

$\text{c) 2Al+3CuCl2$\rightarrow$2AlCl3+3Cu}$

Tỉ lệ: $\text{2:3:2:3}$

$\text{d) 2C6H6+15O2$\xrightarrow{t^o}$12CO2+6H2O}$

Tỉ lệ: $\text{2:15:12:6}$

$\text{e) 6NaOH+Fe2(SO4)3$\rightarrow$3Na2SO4+2Fe(OH)3}$

Tỉ lệ: $\text{6:1:3:2}$

$\text{f) 2SO2+O2$\xrightarrow{t^o}$2SO3}$

Tỉ lệ: $\text{2:1:2}$
$\text{g) 2Fe+3Cl2$\xrightarrow{t^o}$2FeCl3}$

Tỉ lệ: $\text{2:3:2}$

$\text{h) Al2O3+6HCl$\rightarrow$2AlCl3+3H2O}$

Tỉ lệ: $\text{1:6:2:3}$

$\text{h) H3PO4+3KOH$\rightarrow$2K3PO4+3H2O}$

Tỉ lệ: $\text{1:3:2:3}$