LU (c) 42 4J 48 (f) Reduce the fractions to the lowest terms. 72 108 30 42 (e) 72 96 42 56 (d) 20 45 60 (c) (b) (a) 60
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Answer:
plss ans..60 points only correct ans
Convert the following word equations into balanced chemical equations :
1. Potassium + Oxygen → Potassium oxide.
2. Sodium + Oxygen → Sodium oxide.
3. Calcium + Oxygen → Calcium oxide.
4. Aluminium + Oxygen → Aluminium oxide.
5. Zinc + Oxygen → Zinc oxide. .
6. Iron + Oxygen → Iron(III) oxide.
7. Lead + Oxygen → Lead oxide.
8. Carbon + Oxygen → Carbon dioxide.
9. Sulphur + Oxygen → Sulphur dioxide.
10. Nitrogen + Oxygen → Nitrogen monoxide.
11. Phosphorus + Oxygen → Phosphorous pentaoxide.
12. Sodium + Chlorine → Sodium chloride.
13. Iron + Chlorine → Iron (III) Chloride.
14. Nitrogen + Chlorine → Nitrogen trichloride.
15. Hydrogen + Chlorine → Hydrogen chloride.
16. Zinc + Sulphur → Zinc sulphide.
17. Iron + Sulphur → Iron(II) sulphide.
18. Hydrogen + Sulphur→ Hydrogen sulphide.
19. Nitrogen monoxide + Oxygen → Nitrogen dioxide.
20. Ammonia + Hydrogen chloride → Ammonium chloride.
21. Carbon dioxide + water → Carbonic acid.
22. Sulphur dioxide + Water → Sulphurous acid.
23. Sulphur trioxide + Water → Sulphuric acid.
Decomposition reactions
24. Copper carbonate → Copper oxide + Carbon dioxide
25. Mercuric oxide → Mercury + Oxygen
26. Copper hydroxide → Copper oxide + Water
27. Potassium nitrate → Potassium nitrite + Oxygen
28. Sodium nitrate → Sodium nitrite + oxygen
29. Lead nitrate → Lead oxide + Nitrogen dioxide + Oxygen
30. Ammonium chloride → Ammonia + Hydrogen chloride
31. Ammonium nitrate → Dinitrogen oxide + water
32. Ammonium nitrite → Nitrogen + water
33. Silver nitrate → Silver + Oxygen + nitrogen dioxide
34. Water → Hydrogen + Oxygen
35. Sodium chloride → Sodium + chlorine.
Displacement reactions:
1. Chlorine + potassium Iodide →Potassium chloride + Iodine
2. Zinc + Copper sulphate → Zinc sulphate + Copper.
3. Iron+ Copper sulphate → Ferrous sulphate + Copper.
4. Potassium + water → Potassium hydroxide + Hydrogen
5. Calcium + water → Calcium hydroxide + Hydrogen
6. Magnesium + Steam → Magnesium oxide + Hydrogen
7. Sodium + Sulphuric acid → Sodium sulphate + Hydrogen
8. Zinc + Sulphuric acid → Zinc sulphate + Hydrogen
9. Iron + Hydrochloric acid → Iron (II) sulphate + Hydrogen
Double decomposition reaction
1. Barium chloride + Sodium sulphate → Sodium chloride + Barium sulphate↓
2. Lead nitrate + Sodium chloride → Lead chloride↓ + Sodium nitrate
3. Copper sulfate + Sodium hydroxide → Sodium sulphate + Copper hydroxide↓
4. Iron (III)chloride + Sodium hydroxide →Iron(III)hydroxide↓ + Sodium chloride
5. Hydrochloric acid + Sodium hydroxide → Sodium chloride + water
6. Copper oxide + Dil. Hydrochloric acid → Copper chloride + water
7. Sodium chloride + Silver nitrate → Sodium nitrate + Silver chloride↓