[msharmavikram]

hello everyone,
I dont have very good chemistry back ground since i have left it 3years ago. I am doing a research and i m facing some problem. I want to know the relation btw concentration and mole fraction. Allow me to explain the problem.

Consider that you are given a one cubic big box consisting of Nitrogen gas in it initially. It is required to make the box contain a mixture of Nitrogen and Oxygen with the mole fraction of 0.3. Now the question is what is the concentration(cm-2/m-2) of Oxygen which has to be applied or feed to the box to create that mole fraction?

Thank you.

[Dan]

Start by looking up the definitions of mole fraction and concentration. For example:

http://en.wikipedia.org/wiki/Mole_fraction

You must show an attempt at the question (Rules).

what is the concentration(cm-2/m-2)

Check your units.