How do I calculate CO2 output from a compressed air tank with 5% CO2?

[wils0645]

If I have a tank of compressed air with 5% CO2 and 95% air, and I know the flow rate coming out of the tank is 0.01 LPM, how do I determine the number of [moles/L] of CO2 coming out of the tank?

 

[lpfr]

Imagine that in the tank you have 95 liters of air and 5 liters of CO2. Compute the number of moles of CO2. This will be the number of moles of CO2 in 100 liters. The rest you can do yourself.

 

[pixel01]

Naturally you will have 5% of 0.01LPM CO2 coming out of the tank. There's a slight change over time because CO2 molecule is 44 which is heavier than air (29). When the tank goes to the end, the concentration of CO2 is higher than 5%, so are other heavier contaminant gases.