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:To obtain pure carbon (II) oxide from its mixture…An oxide has the following properties. The oxide is?To obtain pure carbon(ii)oxide from its mixture with…The system of election whereby each political party…What mass of copper will be deposited by the…