Question

if i mix sulphur with copper powder what is the result

Answer 1

The result of mixing sulphur with copper powder is Copper monosulfide:

$$\mathrm{Cu} + \mathrm{S} \rightarrow \mathrm{CuS}$$

CuS is a black colloidal precipitate. Copper monosulfide is a chemical compound of copper and sulfur. It occurs in nature as the dark indigo blue mineral covellite. It is a moderate conductor of electricity.