Manganese dioxide (MnO2) is a black powder.
Yes
it is indeed a compound, but its more of a mixture actually.
Potassium nitrate (KNO3) is the chemical name for the compound also known as saltpeter, which is one of the major ingredients of black powder (the other major ingredients being carbon, generally charcoal, and sulphur).
The most common compound of plutonium is plutonium dioxide - PuO2.
I think it could be Barium sulphate if its a powder
The green powder belongs to the category of chemical substances. This is because it undergoes a chemical change when heated, giving off a gas and forming a black solid, indicating a chemical reaction has occurred.
No, it is a mixture.
Gold (III) carbonate is not a stable compound and does not exist in a pure form.
Black powder absorbs moisture from the atmosphere
Only after a serious analysis (chemical and physical) of the powder.
Black powder is a mixture made by finely integrating potassium nitrate, charcoal and sulfur in the ratio 75:15:10 into each other. Smokeless powder consists primarily of nitrocellulose(also called guncotton) which is a compound made by reacting cellulose(cotton is a pure source, hence the name) with nitric acid with sulfuric acid used as a catalyst. Nitroglycerine, nitroangudine and other additives are also added. Smokeless powder is much stronger than black powder. Smokeless powder is used in guns, to propel bullets. Black powder is used to propel fireworks and was once used in guns(when smokeless powders were not invented).
When silver is burned in the air, it forms silver oxide. This compound is a black powder that can be seen during the burning process.