[{"title": "Balancing an Equation", "content": "Unbalanced: H₂ + O₂ → H₂O. Count atoms: 2H and 2O on left, 2H and 1O on right. Balanced: 2H₂ + O₂ → 2H₂O.", "solution": "2H₂ + O₂ → 2H₂O (4H and 2O on each side)"}]