18. 3. 30˚ _________ .
19. 2. 40˚ _________ .
20. 4. 20˚ _________ .
21. 3. 40˚ _________ .
22. 2. 8 _________˚.
23. 3. 81 _________˚.
24. 4. 64 _________˚.
25. 40˚ 25 , 60˚ 4 . _________.( .)
26. 40˚ 4, 20˚ 49 . _________.( .)
27. + 2 = 2. 3 _________ . ( .)
28. () + 2() = 2(). 3 _________ . ( .)
1.
| 1) | FeCl2 + 2NaOH = Fe(OH)2↓ + 2NaCl |
| 2) | 2K + 2H2O = 2KOH + H2↑ |
| 3) | 2Na + Cl2 = 2NaCl |
| 4) | 2 + I2 = 2HI |
2.
| 1) | KOH + HBr = KBr + H2O |
| 2) | CO2 + C = 2CO |
| 3) | 2Mg + O2 = 2MgO |
| 4) | Ba(NO3)2 + K2SO4 = BaSO4 + 2KNO3 |
3.
N2() + 3H2() 
2NH3() + Q
| 1) | |
| 2) | |
| 3) | |
| 4) |
4.
2CO() CO2() + C() + Q
| 1) | CO |
| 2) | |
| 3) | 2 |
| 4) |
5.
2SO2() + O2() 2SO3() + Q
| 1) | |
| 2) | |
| 3) | |
| 4) |
|
|
|
6.
O() + 2O() O2() + 2() + Q
| 1) | 2 |
| 2) | |
| 3) | |
| 4) |
7.
25() + 3() 325() + 2() + Q
| 1) | |
| 2) | |
| 3) | |
| 4) |
8.
Fe2O3() + 32() 2Fe() + 3H2O() Q
| 1) | Fe2O3 |
| 2) | |
| 3) | |
| 4) |
9.
CO2() + C() 2CO() Q
| 1) | |
| 2) | |
| 3) | 2 |
| 4) |
10.
| 1) | H2() + 24() 2H6()
|
| 2) | 2HCl() H2() + Cl2()
|
| 3) | 2NH3() N2() + 3H2()
|
| 4) | 2SO2() + O2() 2SO3()
|
11. c
| 1) | H2() + S() H2S() + Q
|
| 2) | H2() + Cl2() 2HCl() + Q
|
| 3) | 2NH3() N2() + 3H2() Q
|
| 4) | N2() + O2() 2NO() Q
|
12. c
| 1) | PCl5() PCl3() + Cl2() Q
|
| 2) | O() + 2() 3() + Q
|
| 3) | 32() 23() Q
|
| 4) | 2O() CO2() + C() + Q
|
13.
22() 22() + 2() Q
| 1) | |
| 2) | |
| 3) | |
| 4) |
14.
O() + 2() 3() +Q
| 1) | |
| 2) | |
| 3) | |
| 4) |
15.
2() + 2() 23() + Q
| 1) | |
| 2) | |
| 3) | |
| 4) |
16.
48() + 2 () 410 () + Q
| 1) | |
| 2) | |
| 3) | |
| 4) |
17.
|
|
|
N24() 2NO2() Q
| 1) | |
| 2) | |
| 3) | |
| 4) |
18.
() + 22() 3() + Q
| 1) | |
| 2) | |
| 3) | |
| 4) |
19. ?
. .
. .
| 1) | |
| 2) | |
| 3) | |
| 4) |
20. ?
. .
. .
| 1) | |
| 2) | |
| 3) | |
| 4) |
