:
, :
.
57. (V): , .
1. 4P + 5O2 = 2P2O5
2. 23 + 42 = 25 + 32
, , , , .
1.
25 + 2 = 23
25 + 22 = 427 ()
25 + 32 = 234 ()
2.
25 + 3 = 3(4)2
3.
25 + 6NaH = Na34 + 3H2O
25 +5, -
, ..
58. : , . -.
1. 25
25 + 32 = 234
2. 3(4)2 + 3H2S4 = 3CaS4 + 234
3. 30%- N3: 3 + 5N3 + 22 = 334 + 5NO↑
, 420, .
.
1.
34 ↔ + + 24-
24-↔ + + 42-
42-↔ + + 43-
.
2. , , .
- ( . +5 ).
Na3PO4+3AgNO3=Ag3PO4+3NaNO3
60. : , .
(II) ( )
:
-.
,
1.
2() + 2 = 2↑
2. 400-5000
() + 2 = 2 ↑
, , ,
, , ;
.
1. .
|
|
|
FeO + CO = Fe + CO2
2.
CO + NaOH = HCOONa
3.
+ Cl2 = COCl2
4. (II) , u
Fe(CO)5
Ni(CO)4
59. IV . . . : , .
6 pe 14 Si 32 Ge
50 Sn 82 Pb
.... ns2np2
.... ns1np3
. . Si -4, -2, +2, +4
Ge, Sn Pb . .
R2
R4
: , , , .
- , ,
, .
- s3
( 1010 , 30000
, . .
- , - , . - s2
. , , .
u - , - sp
≡і≡і,
===== .
. .
, 60, 70, 76, 84 .
.
1. + 2 = 2 + Q
(II) 2 + 2 = 2
2. ,
+ 2S = CS2
3.
+ 2 = + 2
4. CuO + C = Cu + CO
1.
+ 2 = 2
2. + 22 = 4
: !
61. (, ). .
