Balancing chemical equations worksheet with practice problems and step-by-step instructions.

- C + O₂ → CO
- C: 1, O: 2
- C: 1, O: 1
- Add coefficient 2 to CO: C + O₂ → 2CO
- Now C: 1, O: 2 on left; C: 2, O: 2 on right → Add coefficient 2 to C: 2C + O₂ → 2CO
- Final: 2C + O₂ → 2CO

- N₂ + H₂ → NH₃
- N: 2, H: 2
- N: 1, H: 3
- Add coefficient 2 to NH₃: N₂ + H₂ → 2NH₃
- Now N: 2, H: 2 on left; N: 2, H: 6 on right → Add coefficient 3 to H₂: N₂ + 3H₂ → 2NH₃
- Final: N₂ + 3H₂ → 2NH₃

- CaCO₃ → CaO + CO₂
- Already balanced: Ca: 1, C: 1, O: 3 on both sides
- Final: CaCO₃ → CaO + CO₂

- HCl + MgO → MgCl₂ + H₂O
- H: 1, Cl: 1, Mg: 1, O: 1
- H: 2, Cl: 2, Mg: 1, O: 1
- Add coefficient 2 to HCl: 2HCl + MgO → MgCl₂ + H₂O
- Now H: 2, Cl: 2, Mg: 1, O: 1 on both sides
- Final: 2HCl + MgO → MgCl₂ + H₂O