Balancing chemical equations and identifying reaction types on a chemistry worksheet.

Final Answer:
1) 3 NaBr + 1 H₃PO₄ → 1 Na₃PO₄ + 3 HBr — Double displacement
2) 3 Ca(OH)₂ + 2 Al₂(SO₄)₃ → 3 CaSO₄ + 2 Al(OH)₃ — Double displacement
3) 3 Mg + 1 Fe₂O₃ → 2 Fe + 3 MgO — Single displacement
4) 2 C₂H₆ + 7 O₂ → 4 CO₂ + 6 H₂O — Combustion
5) 2 PbSO₄ → 2 PbSO₃ + 1 O₂ — Decomposition
6) 2 NH₃ + 3 I₂ → 1 N₂I₆ + 3 H₂ — Synthesis (or combination; note: N₂I₆ is unusual but fits given equation)
7) 1 H₂O + 1 SO₃ → 1 H₂SO₄ — Synthesis
8) 1 H₂SO₄ + 2 NH₄OH → 2 H₂O + 1 (NH₄)₂SO₄ — Double displacement