Write the balanced chemical equation for the formation of copper sulfide from copper and sulfur.
9. If in this experiment you did not burn all of the excess sulfur before you weighed your final product, how would the calculated empirical formula of copper sulfide be affected? Be spe-cific.
10. Suppose you added 12.408 g of sulfur to 5.717 g of copper and repeated this experiment, how many moles of copper sulfide could you theoretically produce? Show your work.