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:The system of election whereby each political party…To obtain pure carbon(ii)oxide from its mixture with…When calcium oxide is heated with carbon, the oxide will?An oven dried soil sample of mass 8g had a mass of…What is the percentage of water content of a soil…