I How do I determine the proper ratio of CO2 and N for my tank?

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To achieve a 25% CO2 and 75% N blend in a 60 cf tank, it's essential to determine the correct amounts of each gas based on either mass or mole ratios. The initial contents of the tank and the method for removing them are crucial factors in calculating the desired blend. The supplier can create the mixture once the specific "recipe" is provided, including the weight of liquid CO2 needed first. Accurate measurements and understanding of gas properties will ensure the proper ratio is achieved. Proper preparation and knowledge of the tank's initial state are key to successfully filling the tank.
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I wish to fill a 60 cf tank with both CO2 and N at a 25% - 75% ratio. I have been told by my supplier that if I can tell them the "Recipe" for my size tank that they could make this happen for me.
What I need to know is the amount of liquid CO2 (measured in pounds) that would be placed into the tank first and then the amount of N that would then be put 'on top' to reach my desired blend.

Thanks,
 
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Hello Jl,

Would that be a mass ratio or a mole ratio ?
What's in the tank initially ? How do you get it out ?
 

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