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The stopcock connecting a 3.69 L bulb containing nitrogen gas at a pressure of 7.19 atm, and a 2.62 L bulb containing carbon dioxide gas at a pressure of 4.00 atm, is opened and the gases are allowed to mix. Assuming that the temperature remains constant, the final pressure in the system is atm.

A mixture of krypton and helium gases is maintained in a 7.51 L flask at a pressure of 1.23 atm and a temperature of 34 °C. If the gas mixture contains 13.2 grams of krypton, the number of grams of helium in the mixture is g.

A mixture of helium and argon gases, in a 8.27 L flask at 41 °C, contains 0.712 grams of helium and 6.61 grams of argon. The partial pressure of argon in the flask is 0.515 atm and the total pressure in the flask is atm.