Depends on what kind- but most powders I buy for reloading are ABOUT $19-$23 per pound.
That depends entirely on how much of it you have.
Gunpowder varies from $15 - $20 American dollars for each pound.
Pretty much the rest of the world.
About 300 pounds
200 pesos
It varies between types of loads, but on average, around 4 grams.
You need four sand and five gunpowder arranged like this: GSG SGS GSG
Depends on the size and duration of the war.
how much gun powder is sole each year
an ingredient in gunpowder is sulphur
There is no specific collective noun for gunpowder, in which case, you use an appropriate noun suited to the situation a pound of gunpowder, a flask of gunpowder, a box of gunpowder, etc.
Assuming you mean gunpowder residue on the skin, any thorough cleaning, such as scrubbing with soap and water, or alcohol cleaner, would do. But there will also be burnt gunpowder burnt into the skin, and these are much less likely to be easily removed. (Powder burns.)