Mk chỉ viết hệ số của từng phương trình thôi :

1) 1: ($\frac{3n}{2}$) : n :n

2) 1 : ($\frac{3n+1}{2}$) : n : (n+1)

3) 1 : ($\frac{3n-1}{2}$) :n :(n-1)

4) 1 : ($\frac{3n-3}{2}$) : n : (n-3)

5) 2 : (3n+1) : 2 : (2n+2)

1.\(Fe_xO_y+2yHCl-->xFeCl_{\dfrac{2y}{x}}+yH_2O\)

2.\(2C_xH_y+\left(\dfrac{4x+y}{2}\right)O_2-->2xCO_2+yH_2O\)

3.\(C_nH_{2n}+\dfrac{3n}{2}O_2-->nCO_2+nH_2O\)

4.\(C_nH_{2n+2}+\left(\dfrac{3n+1}{2}\right)O_2-->nCO_2+\left(n+1\right)H_2O\)

5. \(2C_xH_yO_z+\left(\dfrac{4x+y-2z}{2}\right)O_2-->2xCO_2+yH_2O\)

6. (pthh này giống pt 3)

1. CnH2n+2 + (3n+1)/2O2 ---> nCO2 + (n+1) H2O

2. CnH2n- 2 + (3n-1)/2O2 ---> nCO2 + (n-1) H2O

3.CnH2n-6 + (2n-3)/2O2 ---> nCO2 + (n-3) H2O

4. CnH2n + 3n/2O2 --> nCO2+ nH2O

\(C_nH_{2n-6}+\dfrac{3n-3}{2}O_2\underrightarrow{^{^{t^0}}}nCO_2+\left(n-3\right)H_2O\)

\(C_nH_{2n+2}O+\dfrac{3n}{2}O_2\underrightarrow{^{^{t^0}}}nCO_2+\left(n+1\right)H_2O\)

$1) C_nH_{2n-6} + \dfrac{3n-3}{2}O_2 \xrightarrow{t^o} n CO_2 + (n - 3) H_2O$

$2) C_nH_{2n+2}O + \dfrac{3n}{2}O_2 \xrightarrow{t^o} nCO_2 + (n + 1)H_2O$

CnH2n-6 +\(\dfrac{3n-3}{2}\)O2 -> nCO2 + (n-3)H2O

CnH2n+2O + \(\dfrac{3n}{2}\)O2 -> nCO2 + (n+1)H2O

\(C_nH_{2n}+\dfrac{3n}{2}O_2\underrightarrow{^{^{t^0}}}nCO_2+nH_2O\)

\(C_nH_{2n+2}+\dfrac{3n+1}{2}O_2\underrightarrow{^{^{t^0}}}nCO_2+\left(n+1\right)H_2O\)

cân bằng hay s bạn

2Cu + O2 -> 2CuO

2Al(OH)3 + 3H2SO4 -> Al2(SO4)3 + 6H2O

2Fe + 3Cl2 -> 2FeCl3

CnH2n + 3n/2O2 -> nCO2 + nH2O

2Cu +02 ------> 2CuO

2Al(0H)3+6H2SO4----->2Al2(SO4)3+6H2O

2Fe + 3Cl ----->2FeCl3

CnH2n+   2n+1/2  O2-----> n CO2 +nH20

(3n-1)/2O2 + CnH2n-2 → (n-1)H2O + nCO2

\(C_nH_{2n+2}+\dfrac{3n+1}{2}O_2\underrightarrow{^{^{t^0}}}nCO_2+\left(n+1\right)H_2O\)