What is the percentage by mass of copper in copper in copper (l) oxide (CU2O)? [O = 16; CU =64] by Sunday | Aug 22 | Chemistry WAEC | 0 comments A. 88.9% B. 80.0% C. 66.7% D. 20.0% E. 11.1% Correct Answer: Option A – 88.9% Users Also Read These:What is the percentage of water content of a soil…To obtain pure carbon(ii)oxide from its mixture with…Calculate the mass of the copper deposited during…A piece of copper of mass 30g loses 60J of heat…What mass of copper will be deposited by the…