Answer:
a) 2NH₃ + 3N₂O → 4N₂ + 3H₂O
Balanced: 4NH₃ + 6N₂O → 8N₂ + 6H₂O
b) 4NH₃ + 3O₂ → 2N₂ + 6H₂O
Balanced: 4NH₃ + 3O₂ → 2N₂ + 6H₂O
These are already balanced. Now, let's simplify them:
a) 4NH₃ + 6N₂O → 8N₂ + 6H₂O
Simplified: 2NH₃ + 3N₂O → 4N₂ + 3H₂O
b) 4NH₃ + 3O₂ → 2N₂ + 6H₂O
This reaction is already simplified.