b)

$S^{-2} + 2e \to S^0$
$N^{+5} \to N^{+2} + 3e$

$3H_2S + 2HNO_3 \to 3S + 2NO + 4H_2O$

c)

$Mg^0 \to Mg^{+2} + 2e$
$N^{+5} + 3e \to N^{+2}$
$3Mg + 8HNO_3 \to 3Mg(NO_3)_2 + 2NO + 4H_2O$

e)

$Al^0 \to Al^{+3} + 3e$
$S^{+6} + 2e \to S^{+4}$
$2Al + 6H_2SO_4 \to Al_2(SO_4)_3 + 3SO_2 + 6H_2O$

g)

$Cu_2S \to 2Cu^{+2} + S^{+6} + 10e$
$N^{+5} + 3e \to N^{+2}$

$3Cu_2S + 16HNO_3 \to 3Cu(NO_3)_2 + 3CuSO_4 + 10NO + 8H_2O$

3,(4nx-2y),3x,(nx-2y),(2nx-2y)

Chúc học tốt

3FexOy + (12x-2y)HNO3 3xFe(NO3)3 + (3x-2y)NO + (6x-y)H2O

3MxOy + (4nx - 2y)HNO3 = 3xM(NO3)n + (nx - 2y)NO + (2nx - y)H2O

M + 2nHNO3 => M(NO3)n + 2nNO + H2O

M + 2nHNO3 --> M(NO3)n + 2nNO + H2O

M_xO_y + 2nHNO₃ \(\rightarrow\)M(NO₃)_n + 2nNO + H₂O.

Chúc bạn hok tốt!!! Online Math

a) 2M_xO_y + \(\left(6x-2y\right)\)H₂SO₄ → \(x\)M₂(SO₄)₃ + \(\left(3x-2y\right)\)SO₂ + \(\left(6x-2y\right)\)H₂O

b) \(3\)M_xO_y + \(\left(12x-2y\right)\)HNO₃ → \(3x\)M(NO₃)₃ + \(\left(3x-2y\right)\)NO + \(\left(6x-y\right)\)H₂O

\(1\\ FeS \to Fe^{3+} + S^{+6} + 9e\\ N^{+5} \to N^{+4} + 1e\\ FeS + 12HNO_3 \to Fe(NO_3)_3 + H_2SO_4 + 9NO_2 + 5H_2O\)

\(2\\ M^0 \to M^{+3} + 3e\\ N^{+5} + 3e \to N^{+2}\\ M + 4HNO_3 \to M(NO_3)_3 + NO + 2H_2O\)

\(xM^{\dfrac{2y}{x}} \to xM^{+n} + (xn-2y)e\\ S^{+6} + 2e \to S^{+4} \\ S^{+6} + 8e \to S^{-2}\\ 10M_xO_y + (5n+2xn-4y)H_2SO_4 \to 5xM_2(SO_4)_n + (xn-2y)SO_2 + (xn-2y)H_2S +(5n+xn-2y) H_2O\)