The reaction you're describing is the combustion of sulfur in the presence of oxygen. Here's the balanced chemical equation:

S (s) + O₂ (g) → SO₂ (g)

Explanation:

* S (s): Sulfur in its solid state

* O₂ (g): Oxygen gas

* SO₂ (g): Sulfur dioxide gas

This reaction produces sulfur dioxide gas, which is a colorless gas with a pungent odor. It's important to note that sulfur dioxide is a significant air pollutant and can contribute to acid rain.