[blueskin]

Hi All,
I've been reading the book "Power_Plant_Engineering- Raja, Srivastava & Dwivedi" and solving few exercises, I am really interested in solving the problem
Chapter 7: probem 7:
A southern California natural gas has the following ultimate analysis by mass: H2 23.3%.
CH4 72% N2 0.76%, and O2 1.22%. The flue gases have the following volumetric analysis:
H2O 15.583% SSWc. CO2 8.387%, O2 3.225%, N2 72.805%. Calculate (a) the percent theoretical air used in combustion and (b) the dew point, in degrees centigrade, if the flue
gases are at 2 bars?
Any help is really appreciated. Thank you. 
Best,
CV