Answer the following physics questions by typing the following: For Mathematics Questions: The equations you need, the rearranged version of the equation that solves for your unknown variable (if needed), all math steps, and your final answer in bold print. Be sure to include the units.

For Conceptual Questions: Full sentences detailing the logic behind your answer, including formulas when necessary.

Questions:
In a lifetime, the average American uses more than a half ton (500 kg) of copper in coins, plumbing, and wiring. Copper is obtained from sulfide ores, such as chalcocite [copper(I) sulfide] by a multistep process. After initial grinding, the ore is “roasted” (heated strongly with oxygen gas) to form powdered copper(I) oxide and gaseous sulfur dioxide. How many moles of oxygen are required to roast 10.0 mol of copper(I) sulfide?