- #1
songoku
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Homework Statement
Which of the following is closest to the mean distance between air molecules at room temperature and pressure (298 K and 101325 Pa)? Assume air is made of 79% N2 and 21% O2 by moles.
A 0.4 nm
B 4 nm
C 40 nm
D 400 nm
E 4 μm
Homework Equations
PV = nRT
The Attempt at a Solution
My idea is to find the volume and take the cube root of volume to get the mean distance between air molecules. However, I don't know how to find the n (number of moles)