Homework Help: physics

Posted by AE on Thursday, December 3, 2009 at 1:07pm.

A resting person requires 14.5 L of oxygen per hour to maintain metabolic activities. Such a person breathes in 0.480 L of air at approximately 25.0 degrees celsius with each breath. The inhaled air is 20.9% while the exhaled air is 16.3%. How many oxygen molecules does a resting person inhale per breath?

physics - drwls, Thursday, December 3, 2009 at 1:18pm
The consumption per hour is not needed to answer this. The way it is worded, the O2 content of the exhaled breath is also not needed. Just compute the number of O2 molecules in 0.480 liters of air at NTP (25 C and 1 atm). I get about 0.00410 moles of O2. Convert that to molecules in the usual way.

Only about 78% of that (163/209) gets absorbed into the bloodstream
physics - Anonymous, Wednesday, January 27, 2010 at 11:52am
j

Answer this Question

Related Questions

chemistry - a resting person requires 14.5 L of O2 per hour to maintain ...
Thermal physics - when breathing slowly a person inhales air at room temperature...
biology! - What is the percentage of oxygen in expired air when a person is ...
Physics - A submarine has run into trouble and is stuck at the bottom of the ...
physics - The basal metabolic rate is the rate at which energy is produced in ...
Chemistry - By using the data in this question, estimate how much oxygen a ...
chemistry - By using the data in this question, estimate how much oxygen a ...
Physics - A person's body is producing energy internally due to metabolic ...
physics, PLEASE ANSWER, I really need help! - The basal metabolic rate is the ...
Physics- LOST! - If the air temperature is the same as the temperature of your ...

For Further Reading

First Name:
School Subject:
Answer: