Gce Model Questions Vol1 2017 Biology Question 10
Practice objective / multiple choice question 10 from the 2017 Gce Model Questions Vol1 Biology examination.
A sealed chamber of 2.0 L contains air at 21% O\(_2\) and 0.04% CO\(_2\). A person at rest consumes O\(_2\) at a rate of 250 mL·min\(^{-1}\) (STP) and produces CO\(_2\) at 200 mL·min\(^{-1}\). Assuming perfect mixing and that the total volume of gas in the chamber remains constant, how many seconds will elapse before the O\(_2\) concentration falls to 15%? (Ignore the small change in CO\(_2\) concentration.)
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About This Question
This is Gce Model Questions Vol1 2017 Biology Question 10. It is one of the objective questions from the 2017 Gce Model Questions Vol1 Biology examination.
Difficulty level: Medium .
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