Purification of copper can be achieved by electrorefining copper from an impure copper anode onto a pure copper cathode in an electrolytic cell. How many hours will it take to plate 18.0 kg of copper onto the cathode if the current passed through the cell is held constant at 31.0 A? Assume the copper in the electrolytic solution is present as Cu2 .

Explain which atom l or m is more stable and why

Look at the reaction below: ca(hco3)2 --> caco3 + co2 + h2o first, balance the reaction. once balanced, use dimensional analysis or another method to find out how many moles of carbon dioxide will be produced if we start with 16.5 moles of calcium bicarbonate (calcium hydrogen carbonate). = mol of co2 number needs to be reported to three significant figures.

Which of the following would be an accurate picture of the earth during the summer time of the northern hemisphere?