Chemistry worksheet featuring exercises on balancing chemical reactions and identifying reaction types such as synthesis, decomposition, single-replacement, double-replacement, and combustion.

Final Answer:
A. Balanced equations:
1) 2 NaBr + Ca(OH)₂ → CaBr₂ + 2 NaOH
2) N₂ + 3 H₂ → 2 NH₃
3) 2 NaCl + F₂ → 2 NaF + Cl₂
4) Pb(OH)₂ + 2 HCl → PbCl₂ + 2 H₂O
5) CH₄ + 2 O₂ → CO₂ + 2 H₂O
6) 3 H₂SO₄ + 2 B(OH)₃ → B₂(SO₄)₃ + 6 H₂O
7) C₅H₉O + 7 O₂ → 5 CO₂ + 4 H₂O
8) Li₃N + 3 NH₄NO₃ → 3 LiNO₃ + (NH₄)₃N
9) 3 HBr + Al(OH)₃ → AlBr₃ + 3 H₂O
10) 3 Pb + 2 H₃PO₄ → Pb₃(PO₄)₂ + 3 H₂

B. Reaction types:
1) double-replacement
2) single-replacement
3) decomposition
4) single-replacement
5) synthesis (also combustion, but synthesis fits best here since it’s forming a compound from elements/oxides — though note: Fe + O₂ + H₂O → Fe(OH)₃ is actually a *combination* reaction; in many curricula, this is called synthesis)

Wait — let’s correct B.5 carefully:
2 Fe + O₂ + 2 H₂O → 2 Fe(OH)₃
This is a synthesis (or combination) reaction — multiple reactants form one product type (a single compound). Combustion usually involves a fuel + O₂ → CO₂ + H₂O (for hydrocarbons), which this is not. So:
1) double-replacement
2) single-replacement
3) decomposition
4) single-replacement
5) synthesis