Calculate new mole% after adding water?

Question

I have a set of gas analysis, the flow rate is 39658.38 Ib/hr, gas density is 0.672. In this case, an amount of 15590.4 Ib/hr vapour need to add to this set of gas. How should I calculate the mole % for the new set of stream which consist of water.

Gas analysis as follow:
Gas Mole%
Nitrogen 0.8
Methane 86.52
Carbon dioxide 10.72
ethane 1.69
propane 0.19
i-butane 0.04
n-pentane 0.01
hydrogen sulfide 0.01

Answer 1

Write the combustion reactions for all H containing compounds and then interpolate.