Em tham khảo!

a)

$\text{PTHH: 2Al+6HCl$\rightarrow$2AlCl3+3H2}$

Tỉ lệ: $\text{2:6:2:3}$

b)

$\text{PTHH: CH4+2O2$\xrightarrow{t^o}$CO2+2H2O}$

Tỉ lệ: $\text{1:2:1:2}$

c)

$\text{PTHH: 6NaOH+Al2(SO4)3$\rightarrow$3Na2SO4+2Al(OH)3}$ 

Tỉ lệ: $\text{6:1:3:2}$

d)

$\text{PTHH: 4CO+Fe3O4$\xrightarrow{t^o}3$Fe+4CO2}$

Tỉ lệ: $\text{4:1:3:4}$

e)

$\text{PTHH: Fe2O3+3H2SO4$\rightarrow$Fe2(SO4)3+3H2O}$

Tỉ lệ: $\text{1:3:1:3}$

Bài 8

a) PTHH: 6Al + 6HCl -> 6$AlCl_{3}$ + 3$H_{2}$ ↑

b) PTHH: CH4 + 2O2 --$t^{0}$-> CO2↑ + 2H2O

c) PTHH : 6NaOH + Al2(SO4)3 -> 3Na2SO4 + 2Al(OH)3↓

d) PTHH: Fe3O4 + 4$CO_{dư}$ --$t^{0}$-> 3Fe + 4CO2↑

e) PTHH Fe2O3 + 3H2SO4 -> Fe2(SO4)3 + 3H2O