Posted by Kit on .
At a certain temperature and pressure, 0.20 mol of carbon dioxide has a volume of 3.1 L. A 3.1L sample of hydrogen at the same temperature and pressure ____.
I think it's supposed to be "contains the same number of molecules" but I'm not sure.
And there's also this one. I think it's 1/3 also, but I'm not sure.
If the atmospheric pressure on Mt. Everest is onethird the atmospheric pressure at sea level, the partial pressure of oxygen on Everest is ___.

Help please? Chemistry 
bobpursley,
You are right on the first one.
On the second, it is 1/3 (without nitpicking about the composition of the atmosphere vs altitude).