After burning sulfur become another compound - sulfur dioxide (SO2), a gas.
solid sulfur oxides that stay behind as ash.
sulfur
Natural gas, methane, contains no sulfur.
Sulfur is the element that has a pungent smell when it is burned. Sulfur is yellow in color and is a non-metal. In ancient times, burning sulfur was a method used to fumigate homes.
Burning sulfur produces sulfur dioxide (SO2).
Sulfur is closely match this puzzle. The density of 2 kg sulfur is double than 1 kg water. So if you weigh the sulfur in immersed state, the weight of sulfur will be 1 kg. Sulfur will displace about 1 kg water and will lose the same weight. After taking out of water, 2 kg sulfur will be 2 kg only. When you burn the sulfur, it will combine with 2 kg oxygen and you will get 4 kg of sulfur bi oxide. So it is fairly close to the answer. 3 kg literally means more than 2 kg. May be you know the better answer.
We can assume the copper wire has reacted completely with excess sulfur being burned off when there is no longer any traces of yellow color sulfur in the crucible.
When burned, sulfur yields toxic sulfur dioxide, which forms irritants in the atmosphere and contributes to acid rain.
Sulfur Dioxide
You think probable to sulfur.
The mass of sulfur is 50,04 g.
fossil fuels produce sulfur dioxide when burned because sulfur is present in them. things like coal which is carbon or gas which is a hydrocarbon are examples of this. fossil fuels are bad because sulfur dioxide causes acid rain. hope this helps :)