paper
For copper, it is an element. It could be both reactant and product. While purifying copper will be the product. But copper would be the reactant in case of preparing hydrogen or copper sulphate salts.
2Cu + O2 ==> 2CuO product is copper(II) oxide4Cu + O2 ==> 2Cu2O product is copper(I) oxide
Brass is an alloy of copper and zinc. The actual amounts of each component can be varied to vary the properties of the finished product. Bronze, a somewhat tougher but similar metal, is primarily an alloy of copper and tin.
Oxygen. The product is copper oxide.
For copper, it is an element. It could be both reactant and product. While purifying copper will be the product. But copper would be the reactant in case of preparing hydrogen or copper sulphate salts.
If it is electrolysis you are talking about, I'm fairly confident the impure copper has to be connected to the positive terminal.
No
copper nitrate :)
A stove and a copper pot
Mining
Yes
pennies these days are not completely made of copper they are just dipped in copper giving them that finished look