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CH4 + 2O2 -> (t°) CO2 + 2H2O
C2H2 + 2Br2 -> C2H2Br4
CH4 + Cl2 -> (askt) CH3Cl + HCl
2C2H2 + 5O2 -> (t°) 4CO2 + 2H2O
C2H4 + Br2 -> C2H4Br2
nCH2=CH2 -> (t°, p, xt) n(-CH2-CH2-)
C2H4 + 3O2 -> (t°) 2CO2 + 2H2O
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
$\rm k)2KMnO_4 \xrightarrow{t^o} K_2MnO_4 + MnO_2 + O_2 \uparrow$
$\rm l)CH_4 + 2O_2 \xrightarrow{t^o} CO_2 + 2H_2O$
$\rm m)2Al + 3H_2SO_4 \rightarrow Al_2(SO_4)_3 + 3H_2 \uparrow$
$\rm n)Na_2CO_3 + CaCl_2 \rightarrow CaCO_3 \downarrow + 2NaCl$
$\rm o)2Na + 2H_2O \rightarrow 2NaOH + H_2 \uparrow$
$\rm p)CaO + 2HNO_3 \rightarrow Ca(NO_3)_2 + H_2O$
$\rm q)P_2O_5 + 3H_2O \rightarrow 2H_3PO_4$
$\rm r)Zn + 2HCl \rightarrow ZnCl_2 + H_2 \uparrow$
$\rm s)4Al + 3O_2 \xrightarrow{t^o} 2Al_2O_3$
$\rm t)Ba(OH)_2 + 2HCl \rightarrow BaCl_2 + 2H_2O$
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 ?.-.
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) 2CnH2n+3nO2→2nCO2+2nH2O
2) CnH2n + 2 + \(\dfrac{3n+1}{2}\) O2 -> nCO2 + (n+1)H2O.
3) CnH2n – 2 + \(\dfrac{3n-1}{2}\) O2 -> nCO2 +(n-1) H2O.
4) CnH2n-6 +\(\dfrac{3n-3}{2}\) O2 -> nCO2 + (n-3) H2O
5) CnH2n+2O+\(\dfrac{3n}{2}\)O2→nCO2+(n+1)H2O
6) 2CxHyOz + \(\dfrac{4x+y-2z}{2}\) O2 →2x CO2 + yH2O
7) CxHyOzNt + \(\left(x+\dfrac{y}{4}\right)-\dfrac{z}{2}\)O2→xCO2+\(\dfrac{y}{2}\)H2O + \(\dfrac{t}{2}\) N2
Bạn L :33 Tớ làm ko chắc nên bn thông cảm nka
1/ \(Cu+AgNO_3\rightarrow?+Ag\)
=>\(Cu+2AgNO_3\rightarrow Cu\left(NO_3\right)_2+2Ag\)
2/ \(Al+Fe_xO_y\rightarrow Fe+?\)
=>\(2yAl+3Fe_xO_y\rightarrow3xFe+yAl_2O_3\)
3/ \(Fe+O_2\rightarrow Fe_xO_y\)
=>\(2xFe+yO_2\rightarrow2Fe_xO_y\)
4/ \(Fe_{.3}O_4+HCl\rightarrow?+?+?\)
=>\(Fe_{.3}O_4+8HCl\rightarrow2FeCl_3+FeCl_2+4H_2O\)
5/\(C_xH_y+O_2\rightarrow CO_2+H_2O\)
=>\(2C_xH_y+\frac{4x+y}{2}O_2\rightarrow2xCO_2+yH_2O\)
2K + 2H2O -> 2KOH + H2\(\uparrow\) ( Phản ứng thế)
2Al + 3O2 -t0-> 2Al2O3 (Phản ứng hóa hợp)
FeO + O2 -> Fe2O3 (Phản ứng hóa hợp)
2KMnO4 - t0-> K2MnO4 +MnO2 + O2\(\uparrow\) ( Phản ứng phân hủy)