(Solved): 1. A \( 20,000,000 \)-ton ore body contains the copper \( (\mathrm{Cu}) \) ore mineral bornite. The ...

1. A \( 20,000,000 \)-ton ore body contains the copper \( (\mathrm{Cu}) \) ore mineral bornite. The cost of producing the ore is \( \$ 85 \) per ton. The pertinent information is below Atomic masses: \( \quad \mathrm{Cu}=63.546 \quad \mathrm{Fe}=55.845 \quad \mathrm{~S}=32.065 \) Perform the following calculations. Don't forget to divide all percentages by 100 (move decimal 2 places to the left) before you put them into the equations. Show all your work, or the problem is automatically wrong. a. (2) Calculate the weight percent of copper \( (\mathrm{Cu}) \) in bornite \( / \mathrm{Cu}_{5} \mathrm{FeS}_{4} \). Set up a table, like in class. \( \begin{aligned} 5 \times 63.546+55.845+4 \times 32.065 & \frac{5 \times 63.55) 5}{501.845} \times 100 \% \\=501.849 \end{aligned} \) \[ \begin{array}{l} \frac{317.75}{501.84} \times 1009 \\ =63.316 \% \quad(63.32 \% \end{array} \] b. (2) Calculate the gross value of this mining operation. c. (2) Calculate the expenses \( (\$ 85 / \) ton \( ) \). d. (2) Calculate the net value (profit or loss) of this mining operation. (Gross - Expenses)