a sample of copper wire with a mass of 1.659 g is heated with excess powdered sulfur until the copper has combined with the sulf

Question

4 years ago

7

a sample of copper wire with a mass of 1.659 g is heated with excess powdered sulfur until the copper has combined with the sulf

ur, and all the extra sulfur has been burned off. The final product (a sulfide of copper ) has a mass of 2.080 g. Calculate the empirical formula of the product, and name it.

Chemistry

1 answer:

BabaBlast [244] · Answer 1 · 2021-11-29T09:05:38+03:00

BabaBlast [244]4 years ago

7 0

Copper mass = 1.659
Copper moles = 1.659 / 64 = 0.0259

Sulfur mass = 2.08 - 1.659 = 0.421
Sulfur moles = 0.421 / 32 = 0.0131

Ratio Copper : Sulfur = 2 : 1

Empirical formula: Cu ₂ S
Name: Copper (I) sulfide