Bạn xem lại PT 1 và 3 nhé.

\(\overset{0}{Al}+H\overset{+5}{N}O_3\rightarrow\overset{+3}{Al}\left(NO_3\right)_3+\overset{0}{N_2}+H_2O\)

\(\overset{0}{Al\rightarrow}\overset{+3}{Al}+3e|\times10\)

\(2\overset{+5}{N}+10e\rightarrow\overset{0}{N_2}|\times3\)

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

\(\overset{^{+2y/x}}{Fe_x}O_y+H\overset{+5}{N}O_3\rightarrow\overset{+3}{Fe}\left(NO_3\right)_3+\overset{+4}{N}O_2+H_2O\)

\(\overset{^{+2y/x}}{Fe_x}\rightarrow x\overset{+3}{Fe}+\left(3x-2y\right)e|\times1\)

\(\overset{+5}{N}+e\rightarrow\overset{+4}{N}|\times\left(3x-2y\right)\)

⇒ Fe_xO_y + (6x-2y)HNO₃ → xFe(NO₃)₃ + (3x-2y)NO₂ + (3x-y)H₂O

(5x-2y) Fe3O4 +(46x-18y) HNO3 => 3(5x-2y) Fe(NO3)3 + NxOy + (23x-9y)H2O

3Fe(OH)x + (12-x)HNO3=> 3Fe(NO3)3 + (3-x) NO + (6+x)H2O

(5x-2y)Fe +(18x-6y) HNO3 => (5x-2y)Fe(NO3)3 + 3NxOy + (9x-3y)H2O

2MxOy + (2x-2y)H2O =>2x MOH + (x-2y)H2

(5x-2y)Fe3O4 + (46x -18y)HNO3 ----------> (15x- 6y)Fe(NO3)3 + NxOy + (23x-9y)H2O

a)\(3M+4nHNO_3-->3M\left(NO_3\right)_n+nNO+2nH_2O\)

b)

\(2M+2nH_2SO_4-->M_2\left(SO_4\right)_n+nSO_2+2nH_2O\)

c)

\(8M+30HNO_3-->8M\left(NO_3\right)_3+3N_2O+15H_2O\)

d)

\(8M+10nHNO_3-->8M\left(NO_3\right)_n+nN_2O+5nH_2O\)

e)\(\left(5x-2y\right)Fe+\left(15x-3y\right)HNO_3-->\left(5x-2y\right)Fe\left(NO_3\right)_3+3N_xO_y+\left(\dfrac{15x-3y}{2}\right)H_2O\)

f) \(3Fe_xO_y+\left(6x+2y\right)HNO_3-->3xFe\left(NO_3\right)_3+\left(2y-3x\right)NO+\left(3x+y\right)H_2O\)

g)\(Fe_xO_y+\left(6x-2y\right)HNO_3-->xFe\left(NO_3\right)_3+\left(3x-2y\right)NO_2+\left(3x-y\right)H_2O\) h)\(Fe_xO_y+2yHCl-->xFeCl_{\dfrac{2y}{x}}+yH_2O\)

i)\(2Fe_xO_y+2yH_2SO_4-->xFe_2\left(SO_4\right)_{\dfrac{2y}{x}}+2yH_2O\)

Al->Al+3 +3e________________ .(5x-2y)

xN+5 +(5x-2y)e\(\rightarrow\)xN+2y/x________.3

\(\Rightarrow\)(5x-2y)Al+(18x-3y)HNO3\(\rightarrow\)(9x-1,5y)H2O+3NxOy+(5x-2y)Al(NO3)3

xFe+2y/x \(\rightarrow\)xFe+3 + (3x-2y)e .1

N+5 +1e\(\rightarrow\)N+4 ____________ .(3x-2y)

\(\rightarrow\)FexOy+(6x-2y)HNO3\(\rightarrow\)(3x-y)H2O+xFe(NO3)3+(3x-2y)NO2

Trên có khác gì dưới đâu bn

Đáp án C.

(5x-2y)Fe₃O₄ + (46x -18y)HNO₃ ® (15x- 6y)Fe(NO₃)₃ + N_xO_y + (23x-9y)H₂O

a) → 

b) →

c) → 

d) → 

e) (5x−2y)Fe(NO₃)₃ + 3N_xO_y + (15x−3y/2)H₂O