The document provides the balanced chemical equations for several reactions: 1) The reaction of copper (II) sulfate with hydrogen nitrate produces copper (II) nitrate and water, along with nitric oxide and sulfur. 2) The reaction of hydrogen sulfide with chlorine produces hydrogen chloride and sulfur. 3) The combustion of methane produces carbon dioxide, water and energy in the form of heat.

1. P) CU +2
S -2
+ 2H+1
N+5
O -2
3 CU +2
(O -2
3)2+ S 0
+H +1
2 O -2
2(N+5
+ 2e-
N+2
)
5( S-2
+O e-
S0
)
SE OXIDAN
2 N+5
+4e-
2N+2
5S-2
+0 e-
5S0
2N+5S+4e 2N+5S
5 Cu S + 6 HNO3 5Cu(NO3)2 +2NO+5 S+H2O
R.- 2 -3
N +1
H3 +3 0
O2 3 +1
H2O -2
+2 0
N2
2(2-3
N-3e N0
2)
3(O0
2+2e 2O -2
)
4N-3
-6e 2N0
3O 0
2+ 6e 6O -2
4N -3
+3O 0
2 2N0
+6O -2
4NH3 +3O 2 6H2O + 2N2
4 N 4
12 H 12 LA ECUACION YA ESTABA BALANCEADA
6 O 6

2. H2S + Cl2 HCl + S
H2
+1
S-2
+ Cl2
0
H+1
Cl-1
+ S0
S-2
– 2e S0
Cl-0
2 + 1e 2Cl-1
2
S-2
S0
2Cl 2 4Cl2
0
s-2
+ 2Cl2
0
S0
+ 4Cl -1
2H2S + 2Cl2 4HCl + 2S
4 H 4
2 S 2
4 Cl 4

3. Srt
H2
0
+ C+2
O-2
C2
-4
H6
+1
O -2
+ H +1
2O-2
3 H2
0
– 1é H6
+1
H2
0
– 1é H2
+1
2 C+2
+ 2é C2
-2
4 H2
0
- 2é H6
+1
+ H2
+1
2 C+2
+ 2é C2
-2
2 (4H2
0
- 2é H6
+1
+ H2
+1
)
2 ( 2C+2
+ 2é 2C2
-2
)
8H2
0
– 4é 2H6
+1
+ 2H2
+1
4C+2
+ 4é 2C2
-2
8H2
0
+ 4+2
2H6
+1
+ 2H2
+1
+ 2C2
-2