A volume of 0.12 m³ of oxygen measured at 6.0 x 10 4 N m?² and 0.15 m ³ of argon at 8.0 x 104 Nm?² are passed into a vessel having a capacity of 0.5 m ³ . What is the total pressure of gas in the vessel if the temperature is kept constant?

How to apply the p1v1=p2v2 formula , or solve this problem by other means?

Thanks!

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