Balancing Equations Worksheet KEY with 20 balanced chemical reactions.

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Final Answer:
The image provided is a completed answer key for a "Balancing Equations Worksheet." It contains 20 balanced chemical equations. Since no specific problem was asked to be solved, and the worksheet is already solved, there is no calculation to perform or final answer to derive other than confirming the content is a list of balanced equations.

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1. Zn (s) + 2 AgNO₃ (aq) ⇒ Zn(NO₃)₂ (aq) + 2 Ag (s)
2. N₂ (g) + 3 H₂ (g) ⇒ 2 NH₃ (g)
3. NaCl (aq) + AgC₂H₃O₂ (aq) ⇒ NaC₂H₃O₂ (aq) + AgCl (s)
4. 3 Mg(OH)₂ (aq) + 2 H₃PO₄ (aq) ⇒ 6 H₂O (l) + Mg₃(PO₄)₂ (aq)
5. 2 HNO₃ (aq) + Ni (s) ⇒ Ni(NO₃)₂ (aq) + H₂ (g)
6. Ba(HCO₃)₂ (s) ⇒ BaCO₃ (s) + H₂O (g) + CO₂ (g)
7. BaCl₂ (aq) + Na₂SO₄ (aq) ⇒ 2 NaCl (aq) + BaSO₄ (s)
8. Al₂(CO₃)₃ (s) ⇒ Al₂O₃ (s) + 3 CO₂ (g)
9. Ca (s) + 2 H₂O (l) ⇒ Ca(OH)₂ (aq) + H₂ (g)
10. 2 LiHCO₃ (s) ⇒ Li₂CO₃ (s) + H₂O (g) + CO₂ (g)
11. 2 N₂ (g) + 5 O₂ (g) ⇒ 2 N₂O₅ (g)
12. MgBr₂ (aq) + 2 KOH (aq) ⇒ 2 KBr (aq) + Mg(OH)₂ (s)
13. Mn (s) + 2 CuCl (aq) ⇒ 2 Cu (s) + MnCl₂ (s)
14. 8 Zn (s) + S₈ (s) ⇒ 8 ZnS (s)
15. 2 NaOH (aq) + H₂SO₄ (aq) ⇒ 2 H₂O (l) + Na₂SO₄ (aq)
16. 2 K (s) + 2 H₂O (l) ⇒ 2 KOH (aq) + H₂ (g)
17. C₅H₁₂ (l) + 8 O₂ (g) ⇒ 6 H₂O (g) + 5 CO₂ (g)
18. 2 KOH (aq) + H₂CO₃ (aq) ⇒ 2 H₂O (l) + K₂CO₃ (aq)
19. C₄H₈O₂ (l) + 5 O₂ (g) ⇒ 4 H₂O (g) + 4 CO₂ (g)
20. 16 Al (s) + 3 S₈ (s) ⇒ 8 Al₂O₃ (s)