calculating percent yield for copper.

1. If you need to produce 3.50 kg of copper metal from a contaminated sample of reclaimed copper wiring, which is 68.3% copper, how many kg of reclaimed copper wiring would you need to buy if your percent yield at each step is 90%? Assume that you will isolate the copper wiring by going through the steps in this lab. Be sure to show all stoichiometry used.2. How might you prepare (in one step) copper(II) nitrate from copper(II) chloride? Include in your answer: the reagent that you would add, a description of the equation that would take place, and an explanation of how you would then isolate the pure copper(II) nitrate from the reaction mixture.3. How might you prepare (in one step) copper(II) hydroxide from copper(II) sulfate? Include in your answer: the reagent that you would add, a description of the equation that would take place, and an explanation of how you would then isolate the pure copper(II) hydroxide from the reaction mixture. Please show all work that is needed to solve the question listed. Requirements: all work must be shown by steps