What percentage of oxygen is contained in exhaled air? by Sunday | Apr 29 | Biology NECO | 0 comments A. 21% B. 16% C. 4% D. 0.04% E. Less than 0.01% Correct Answer: Option B – 16% Users Also Read These:What volume of oxygen will be left unreacted when a…Calculate the percentage composition of oxygen in…Exhaled air differs from inhaled air in that it?The system of election whereby each political party…What volume of oxygen will remain after reacting 8cm…