Wikipedia has extensive information on the origins of gunpowder / flash powder you should be able to find a wealth of information there.
China
China
Black Powder.
Gun powder is always a mixture.
gun powder was udes for fireworks, then weapons
Gun Powder is the most important thing in a war because if you don't have gun powder you wouldn't stand a chance.
The gunpowder came to blow open a cave to get the vase for the athanian treasury.
Gun powder is a powder.
Because China invented gun powder.
Saltpetre+sulphurSaltpeter + sulfer = Gun powder
Gun powder contain sulfur and carbon; they are nonmetals.
john smith had the gun powder injury in 1609.