1) 2

2) C_nH_{2n + 2} + \(\dfrac{3n+1}{2}\) O₂ -> nCO₂ + (n+1)H₂O.

3) C_nH_{2n – 2} + \(\dfrac{3n-1}{2}\) O₂ -> nCO₂ +(n-1) H2O.

4) C_nH_2n-6 +\(\dfrac{3n-3}{2}\) O2 -> nCO2 + (n-3) H2O

5) O+\(\dfrac{3n}{2}\)O2→n+(n+1)H2O

6) 2C_xH_yO_z + \(\dfrac{4x+y-2z}{2}\) O2 →2x CO₂ + yH₂O

7)

8)

9) 2

10)

11)

12) 3

\(2C_xH_yO_z+\dfrac{4x+y-2z}{2}O_2\underrightarrow{t^o}2xCO_2+yH_2O\)

\(2C_xH_yO+\dfrac{4x+y-2}{2}O_2\underrightarrow{t^o}2xCO_2+yH_2O\)

\(6Fe_xO_y+\left(12x-2y\right)H_2SO_{4\left(đ\right)}\underrightarrow{t^o}3xFe_2\left(SO_4\right)_3+\left(3x-2y\right)S+\left(12x-2y\right)H_2O\)

\(8Fe_xO_y+\left(30x-4y\right)HNO_3\rightarrow8xFe\left(NO_3\right)_3+\left(3x-2y\right)N_2O+\left(15x-2y\right)H_2O\)

\(2C_xH_y+\left(\dfrac{2x+y}{2}\right)O_2\rightarrow2xCO_2+yH_2O\)

\(C_nH_{2n+2}+\left(\dfrac{3n+1}{2}\right)O_2\rightarrow nCO_2+\left(n+1\right)H_2O\)

\(C_nH_{2n}+\dfrac{3n}{2}O_2\rightarrow nCO_2+nH_2O\)

2NH3 + 3CuO N2 + 3Cu + 3H2O

2Al + 2KOH + 2H2O 2KAlO2 + 3H2

2AgNO3 2Ag + 2NO2 + O2

2Zn(NO3)2 2ZnO + O2 + 4NO2

4Fe(NO3)3 2Fe2O3 + 12NO2 + 3O2

4Zn + 5H2SO4 4ZnSO4 + 4H2O + H2S

3Mg + 4H2SO4 3MgSO4 + S + 4H2O

10Al + 36HNO3 10Al(NO3)3 + 3N2 + 18H2O

2NH3 + 3CuO → N2 + 3Cu + 3H2O

2Al + 2KOH + 2H2O → 2KAlO2 + 3H2

2AgNO3 → 2Ag + 2NO2 + O2

2Zn(NO3)2 →2ZnO + O2 + 4NO2

4Fe(NO3)3 → 2Fe2O3 + 12NO2 + 3O2

4Zn + 5H2SO4 → 4ZnSO4 + 4H2O + H2S

3Mg + 4H2SO4 → 3MgSO4 + S + 4H2O

10Al + 36HNO3 → 10Al(NO3)3 + 3N2 + 18H2O

Sao bài cân bằng nào cx khó thế này ?.-.

1: 2KMnO4 + 16HCl -> 2KCl + 2MnCl2 + 5Cl2 + 8H2O

2: Fe3O4 + 8HCl --> FeCl2 + 2FeCl3 + 4H2O

3: 3FexOy + 2yAl --> 3xFe + yAl2O3

4: 2FexOy + (6x-2y)H2SO4 --> xFe2(SO4)3 + (3x-2y)SO2 + (6x-2y)H2O

5: FexOy + yH2 --> xFe + yH2O

a) \(N_2+O_2\rightarrow2NO\)

\(\begin{matrix}N^0\rightarrow N^{+2}+2e\\O^0+2e\rightarrow O^{-2}\end{matrix}|\begin{matrix}\times1\\\times1\end{matrix}\)

b) \(C_2H_5OH+3O_2\rightarrow2CO_2+3H_2O\)

\(\begin{matrix}C^{-2}\rightarrow C^{+4}+6e\\O^0+2e\rightarrow O^{-2}\end{matrix}|\begin{matrix}\times1\\\times3\end{matrix}\)

c) \(CH_4+2O_2\rightarrow CO_2+2H_2O\)

\(\begin{matrix}C^{-4}\rightarrow C^{+4}+8e\\O^0+2e\rightarrow O^{-2}\end{matrix}|\begin{matrix}\times1\\\times4\end{matrix}\)

d) \(2H_2S+3O_2\rightarrow2H_2O+2SO_2\)

\(\begin{matrix}S^{-2}\rightarrow S^{+4}+6e\\O^0+2e\rightarrow O^{-2}\end{matrix}|\begin{matrix}\times1\\\times3\end{matrix}\)

e) \(4NH_3+3O_2\rightarrow2N_2+6H_2O\)

\(\begin{matrix}N^{-3}\rightarrow N^0+3e\\O^0+2e\rightarrow O^{-2}\end{matrix}|\begin{matrix}\times2\\\times3\end{matrix}\)

a)N2+O2->2NO

b)C2H5OH+3O2->2CO2+3H2O

c)CH4+2O2->CO2+2H2O

d)H2S+3/2O2->H2O+SO2 / 2H2S+3O2->2H2O+2SO2

e)2NH3+3/2O2->N2+3H2O / 4NH3+3O2->2N2+6H2O

CHÚC BN HỌC TỐT :))))

1. \(4P+5O_2\rightarrow2P_2O_5\)

2. \(N_2+3H_2\rightarrow2NH_3\)

4. \(Fe+2HCl\rightarrow FeCl_2+H_2\)

3. \(2Al+6HCl\rightarrow2AlCl_2+H_2\)

5. \(Fe_2O_3+3H_2SO_4\rightarrow Fe_2\left(SO_4\right)_3+3H_2O\)

6. \(Fe_3O_4+4H_2\rightarrow3Fe+4H_2O\)

7. \(2Fe+3Cl_2\rightarrow2FeCl_3\)

8. \(2Al+3S\rightarrow Al_2S_3\)

9. \(2Al_2O_3\rightarrow4Al+3O_2\)

1. 4P+5O2→2P2O5

2. N2+3H2→2NH3

4. Fe+2HCl→FeCl2+H2

3. 2Al+6HCl→2AlCl2+H2

5. Fe2O3+3H2SO4→Fe2(SO4)3+3H2O

6. Fe3O4+4H2→3Fe+4H2O

7. 2Fe+3Cl2→2FeCl3

8. 2Al+3S→Al2S3

9. 2Al2O3→4Al+3O2

5)

6) 4H2 + Fe3O4 to→ 3Fe + 4H2O

7) 3CO + Fe2O3to → 2Fe + 3CO2

8) 4CO + Fe3O4 to→ 3Fe + 4CO2

9) 2C2H2 + 5O2 to→ 4CO2 + 2H2O

10) C2H6O + 3O2 to→ 2CO2 + 3H2O

*CTV

6) 4H₂ + Fe₃O₄ → 3Fe + 4H₂O

7) 3CO + Fe₂O₃ → 2Fe + 3CO₂

8) 4CO + Fe₃O₄ → 3Fe + 4CO₂

9) 2C₂H₂ + 5O₂ \(\underrightarrow{t^o}\) 4CO₂ + 2H₂O

10) C₂H₆O + 3O₂ \(\underrightarrow{t^o}\) 2CO₂ + 3H₂O

6) 4$H_2+F{e}_3{O}_4\to \mathrm{3F}e+{\mathrm{4H}}_{2}O$

7) $\mathrm{3C}O+F{e}_2{O}_3\to \mathrm{2F}e+\mathrm{3C}{O}_2$

8) $\mathrm{4C}O+F{e}_3{O}_4\to \mathrm{3F}e+\mathrm{4C}{O}_2$

9) ${\mathrm{2C}}_2{H}_2+{\mathrm{5O}}_2\to \mathrm{4C}{O}_2+{\mathrm{2H}}_{2}O$

10) $C_2{H}_{6}O+{\mathrm{3O}}_2\to \mathrm{2C}{O}_2+{\mathrm{3H}}_{2}O$

a) \(K_2O+H_2O->2KOH\)

b) \(2Fe+3Cl_2->2FeCl_3\)

c) \(2Al\left(OH\right)_3+3H_2SO_4->Al_2\left(SO_4\right)_3+6H_2O\)

d) \(4FeS_2+11O_2->2Fe_2O_3+8SO_2\)

e)\(2Al+6HCl->2AlCl_3+3H_2\)

f) \(2KClO_3->KCl+3O_2\)

g) \(4P+5O_2->2P_2O_5\)

h) \(3Fe+2O_2->Fe_3O_4\)

i) \(2Al+3CuSO_4->Al_2\left(SO_4\right)_3+3Cu\)

j) \(2K+2H_2O->2KOH+H_2\)