Hi, please could someone give me some advice on how I would convert the mol fraction to percentage? i.e. I want a gas mixture of Argon and Carbon dioxide with only 0.02 mol fraction of CO2, what would this be as a percent? I tried using this: http://www.convert-me.com/en/convert/percent/mole.html [Broken] And when I put 0.02 in I get 1.204*10^24 in the percent term, how can this be a percentage? Thanks for any help with this.