The balanced equation for the complete combustion of sulfur in oxygen is:

S (s) + O₂ (g) → SO₂ (g)

Here's a breakdown:

* S (s): Sulfur in its solid state.

* O₂ (g): Oxygen gas.

* SO₂ (g): Sulfur dioxide gas, the product of combustion.

This equation shows that one mole of solid sulfur reacts with one mole of oxygen gas to produce one mole of sulfur dioxide gas.