Giúp emmmmmmm

Đáp án:

Giải thích các bước giải:

$\mathop{N}\limits^{-3} \rightarrow \mathop{N}\limits^{+2}+5e$     |×4

`O_2+4e->`$\mathop{O}\limits^{-2}$  |×5

$4NH_3+5O_2\xrightarrow{850°C, Pt)} 4NO+6H_2O$

$\mathop{C}\limits^{+2}\rightarrow \mathop{C}\limits^{+4}+2e$    |×3

$\mathop{Fe}\limits^{+3}+3e\rightarrow \mathop{Fe}\limits^{0}$ |×2

$3CO+Fe_2O_3\xrightarrow{t°}3CO_2+2Fe$

$\mathop{Cu}\limits^{0}\rightarrow \mathop{Cu}\limits^{+2}$    |×1

$\mathop{S}\limits^{+6}\rightarrow \mathop{S}\limits^{+4}$   |×1

`Cu+2H_2SO_4(đ, n) ->CuSO_4+2H_2O+SO_2`

$\mathop{Fe}\limits^{0}\rightarrow \mathop{Fe}\limits^{+3}+3e$ |×1

$\mathop{N}\limits^{+5}+3e\rightarrow \mathop{N}\limits^{+2}$ |×1

`Fe+4HNO_3->Fe(NO_3) _3+NO+2H_2O`

$\mathop{Al}\limits^{0}\rightarrow \mathop{N}\limits^{+3}$ |×4

$\mathop{N}\limits^{+5}+4e\rightarrow \mathop{N}\limits^{+1}$ |×3

`8Al+30HNO_3->8Al(NO_3) _3+3N_2O+15H_2O`

$\mathop{Zn}\limits^{0}\rightarrow \mathop{Zn}\limits^{+2}$   |×4

$\mathop{S}\limits^{+6}+8e\rightarrow \mathop{S}\limits^{-2}$  |×1

`4Zn+5H_2SO_4(đ, n) ->4ZnSO_4+H_2S+4H_2O`

$\mathop{Mg}\limits^{0}\rightarrow \mathop{Mg}\limits^{+2}+2e$   |×4

$\mathop{N}\limits^{+5}+8e\rightarrow \mathop{N}\limits^{-3}$   |×1

`4Mg+10HNO_3->4Mg(NO_3) _2+NH_4NO_3+3H_2O`

$\mathop{Mn}\limits^{+7}+3e\rightarrow \mathop{Mn}\limits^{+4}$  |×2

$\mathop{S}\limits^{+4}\rightarrow \mathop{S}\limits^{+6}+2e$  |×3

`2KMnO_4+3K_2SO_3+H_2O->3K_2SO_4+2MnO_2+2KOH`

$\mathop{Mn}\limits^{+7}\rightarrow \mathop{Mn}\limits^{+2}$    |×1

$\mathop{Fe}\limits^{+2}\rightarrow \mathop{Fe}\limits^{+3}+e$  |×5

`2KMnO_4+8H_2SO_4+10FeSO_4->K_2SO_4+5Fe_2(SO_4) _3+2MnSO_4+8H_2O`

$\mathop{Mn}\limits^{+4}+2e\rightarrow \mathop{Mn}\limits^{+2}$  |×1

$2\mathop{Cl}\limits^{-1}\rightarrow Cl_2+2e$   |×1

$MnO_2+4HCl\rightarrow{t°}MnCl_2+Cl_2+2H_2O$

$\mathop{Fe}\limits^{0}\rightarrow \mathop{Fe}\limits^{+3}$   |×8

$\mathop{S}\limits^{+6}+8e\rightarrow \mathop{S}\limits^{-2}$    |×3

`8Fe+15H_2SO_4(đ, n) ->4Fe_2(SO_4) _3+3H_2S+12H_2O`

$\mathop{Mg}\limits^{0}\rightarrow \mathop{Mg}\limits^{+2}+2e$  |×3

$\mathop{S}\limits^{+6}+6e\rightarrow \mathop{S}\limits^{0}$    |×1

`3Mg+4H_2SO_4(đ, n) ->3MgSO_4+S+4H_2O`

$\mathop{Fe}\limits^{+3}+e\rightarrow \mathop{Fe}\limits^{+2}$    |×2

$\mathop{Cu}\limits^{0}\rightarrow \mathop{Cu}\limits^{+2}$  |×1

`2FeCl_3+Cu->CuCl_2+2FeCl_2`