- #1

mexqwerty

- 13

- 0

The second person to leave also takes a breath as deep as possible by exhaling as far as possible (leaving a volume of 1.140 L in their lungs), and then slowly inhaling to increase their lung volume by 4.740 L. His body temperature is also 37.70 °C.

(i) How many particles of air do their lungs contain after inhaling?

(ii) This person breathes out all the way to the surface in order to maintain a constant lung volume. How many moles of gas remain in the lungs?

The answers are 4.86e23 and 0.23mol respectively but I don't know how to get them.

I don't have an idea of how to do (i) and for (ii), I'm using PV=nRT (n=PV/RT) but I can't get the right answer. Values I used:

P = 3.500 atm

V = 1.140L +4.740 L

R = 8.315

T = 37.70+273 K

And I got n=7.97e-3 mol which is not right. Am I supposed to do something else?