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

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) \(\overset{+2}{Fe}\overset{-1}{S_2}+\overset{0}{O_2}\rightarrow\overset{+3}{Fe_2}\overset{-2}{O_3}+\overset{+4}{S}\overset{-2}{O_2}\)

quá trình OXH :\(\overset{+2}{Fe}\overset{-1}{S_2}\rightarrow\overset{+3}{Fe}+\overset{+4}{2S}+11e|\times4\)

quá trình khử : \(\overset{0}{2O}+2.2e\rightarrow\overset{-2}{2O}|\times11\)

2) \(\overset{+2}{Fe}\overset{-2}{S}+H\overset{+5}{N}O_3\rightarrow\overset{+3}{Fe}\left(\overset{+5}{N}O_3\right)_3+\overset{+2}{N}\overset{-2}{O}+H_2O+H_2\overset{+6}{S}O_4\)

quá trình OXH : \(\overset{+2}{Fe}\overset{-2}{S}\rightarrow\overset{+3}{Fe}+\overset{+6}{S}+9e|\times1\)

quá trình khử : \(\overset{+5}{N}+3e\rightarrow\overset{+2}{N}|\times3\)

\(\Rightarrow FeS+6HNO_3\rightarrow Fe\left(NO_3\right)_3+3NO+2H_2O+H_2SO_4\)

CÒN ĐỂ CHIỀU MK LM CHO NHA

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)

$\rm k)2KMnO_4 \xrightarrow{t^o} K_2MnO_4 + MnO_2 + O_2 \uparrow$
$\rm l)CH_4 + 2O_2 \xrightarrow{t^o} CO_2 + 2H_2O$
$\rm m)2Al + 3H_2SO_4 \rightarrow Al_2(SO_4)_3 + 3H_2 \uparrow$
$\rm n)Na_2CO_3 + CaCl_2 \rightarrow CaCO_3 \downarrow + 2NaCl$
$\rm o)2Na + 2H_2O \rightarrow 2NaOH + H_2 \uparrow$
$\rm p)CaO + 2HNO_3 \rightarrow Ca(NO_3)_2 + H_2O$
$\rm q)P_2O_5 + 3H_2O \rightarrow 2H_3PO_4$
$\rm r)Zn + 2HCl \rightarrow ZnCl_2 + H_2 \uparrow$
$\rm s)4Al + 3O_2 \xrightarrow{t^o} 2Al_2O_3$
$\rm t)Ba(OH)_2 + 2HCl \rightarrow BaCl_2 + 2H_2O$

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

PTHH (1), (2), (3), (5), (8) đã cân bằng

\(\left(4\right)Ca\left(OH\right)_2+H_2SO_4\rightarrow CaSO_4+2H_2O\)

\(\left(6\right)Al\left(OH\right)_3+3HCl\rightarrow AlCl_3+3H_2O\)

\(\left(7\right)MnO_2+4HCl\rightarrow MnCl_2+Cl_2+2H_2O\)

\(\left(9\right)P_2O_5+3H_2O\rightarrow2H_3PO_4\)

\(\left(10\right)2Fe\left(OH\right)_3\underrightarrow{t^o}Fe_2O_3+3H_2O\)

CaO + CO₂ → CaCO₃

CaO + H₂O → Ca(OH)₂

CaCO₃ + H₂O + CO₂ → Ca(HCO₃)₂

Ca(OH)₂ + H₂SO₄ → CaSO₄ + 2H₂O

Fe + H₂SO₄ → FeSO₄ + H₂

2Al(OH)₃ + 6HCl → 2AlCl₃ + 6H₂O

MnO₂ + 4HCl → MnCl₂ + Cl₂ + 2H₂O

H₂SO₄ + Na₂CO₃ → Na₂SO₄ + CO₂ + H₂O

P₂O₅ + 3H₂O → 2H₃PO₄

2Fe(OH)₃ \(\underrightarrow{to}\) Fe₂O₃ + 3H₂O

\(Ca\left(OH\right)_2+H_2SO_4\rightarrow CaSO_4+2H_2O\)

\(Al\left(OH\right)_3+3HCl\rightarrow AlCl_3+3H_2O\)

\(MnO_2+4HCl\rightarrow MnCl_2+Cl_2+2H_2O\)

\(P_2O_5+3H_2O\rightarrow2H_3PO_4\)

\(2Fe\left(OH\right)_3\rightarrow Fe_2O_3+3H_2O\)

PT còn lại đều cân bằng rồi bạn à

M bik lm r thì kệ m

Ai lm cho m đâu

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

\(2C_4H_{10}+13O_2\rightarrow CO_2+10H_2O\)

\(2C_xH_y+\frac{\left(4x+y\right)}{2}O_2\rightarrow2xCO_2+yH_2O\)

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

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

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

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