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I am creating the mixture by first adding 1 gas to a tank. Then I add the second gas to complete the mixture. My pressure gauge reads in psig so my thought is that I need to fill to 52 psig with Pa (50% of 10 bar absolute converted to psi gauge) and then top off with Pb to 130 psig (equivalent...

I am starting from a vacuum.

I guess I need a refresher. I have a 2 part gas mixture (40% Pa and 60% Pb). I know that the total fill pressure is 10 bar absolute. I need to fill with Pa first using gauge pressure. I was told that I have to subtract atmospheric pressure from the partial pressures of Pa and Pb to determine...