Uploaded September 2025 | Updated September 2026, 2 weeks ago

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How to balance S + O2 → SO2 (Sulfur + Oxygen Yields Sulfur Dioxide).
Also shown with subscripts: S + O₂ → SO₂.

Interactive Balancing Practice: Breslyn.org/balancing

In this quick chemistry example, we check sulfur and oxygen atoms step by step to confirm that the equation is already balanced. This is a classic combination reaction and follows the law of conservation of mass.

Equation:
S + O2 → SO2
S + O₂ → SO₂

What you’ll learn:
• How to balance sulfur plus oxygen yields sulfur dioxide
• Why the coefficients are 1, 1, 1
• The difference between coefficients and subscripts

Final balanced equation:
S + O2 → SO2

For more chemistry practice, check out Breslyn.org/balancing or youtu.be/Qci7hiBy7EQ