I will try to translate the best I can:
In 1cm3 of air, how much of it is molecules and how much is the space between them. diameter of 1 molecule is 0,1nm and is has a sphere shape.
The Attempt at a Solution
I calculated that the V of the molecule is 4,187*10cm3 but then when I use the other formula (N/Na=V/V0) I get that there is less then one molecule in that space which is impossible. Please use cm3 everywhere.