Question

Empirical formula of 25.13g sulfur and 49.87g copper

Answer 1

Copper + sulfur create copper sulfide.

It's a lengthy process to find the empirical formula:

Sulfur:

`25.13g * (1 mol)/(32.065 g) = 0.78 mol`

Copper:

`49.87 * (1 mol)/(63.546 g) = 0.78mol`

S:Cu =>
`(0.78)/(0.78) :(0.78)/(0.78)` =>
`(1:1) * 1` =>
`1:1`

The empirical formula would just be
`CuS`