Properties of gun powder

Black powder has a chemical formula consisting of C₇H₄O + S + KNO₃. Black powder is a black powder. That will ignite under various circumstances. The chemical equation for the burning of gunpowder is 10KNO₃ + 8C +3S = 2K₂CO₃ + 3K₂SO₄ + 6CO₂ + 5N₂