B. Empirical Formula of Copper Sulfide 27.536g 35.097 mass of crucible and cover + copper wire (before heating) 27.075g 34.361g mass of crucible and cover 0.461 g 0.736 mass of copper wire mass of crucible and cover + copper sulfide (after heating) 27.7478 35.468g mass of crucible and cover + copper sulfide (optional second heating) g mass of combined sulfur (after heating - before heating) Show the calculation of the empirical formula for trial 1 (see Example Exercise 7.2).

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