Consider a room in which there is a leak of carbon monoxide (CO). While the impacts on an individual human will vary, suppose that someone exposed to 800 ppm (on a volumetric basis, 0.08%) will die...

Consider a room in which there is a leak of carbon monoxide (CO). While the impacts on an individual human will vary, suppose that someone exposed to 800 ppm (on a volumetric basis, 0.08%) will die within 3 hours. Initially the room is empty of CO and contains 21 kg of air. The CO leak adds 0.1 kg of CO to the room each hour. Ignore any air or CO exiting the room. How long will the leak need to go undetected for the molar CO concentration to reach 800 ppm?