[TheUnfocusedOne]

I haven't a clue how to answer the following:

Assuming that air is approximately 80 percent nitrogen and 20 percent oxygen by volume, which of the following is closest to the density of air at 0C and 1 atm?

-0.01 g/l
-0.1 g/L
-1 g/L
-10 g/L
-100g/L

You're not supposed to have  to do much math on these problems, and all my possible route are very numerical so that can't be right.

Is this one of those stupid problems that you just need to know the answer to?
 

[fledarmus]

see if this helps - at 1 atm and 0C, 1 mole of a gas occupies 22.4 liters - that should get you within an order of magnitude, which is all you need.

[TheUnfocusedOne]

see if this helps - at 1 atm and 0C, 1 mole of a gas occupies 22.4 liters - that should get you within an order of magnitude, which is all you need.

I thought I was over thinking it...

Thanks!