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The stopcock connecting a 1.00 L bulb containing helium gas at a pressure of 554 torr,...

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Chemistry

The stopcock connecting a 1.00 L bulb containing helium gas at apressure of 554 torr, and a 1.00 L bulb containing krypton gas at apressure of 504 torr, is opened and the gases are allowed to mix.Assuming that the temperature remains constant, the final pressurein the system is ____torr

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Solution :-

Total volume after mixing = 1.00 L + 1.00 L = 2.00 L

partial pressure of the Helium in the mixture = 1.00 L * 554 torr / 2.00 L = 277 torr

partial pressure of the krypton in the mixture = 1.00 L * 504 torr / 2.00 L = 252 torr

total pressure of the gases after mixing = P helium + P krypton

                                                              = 277 torr + 252 torr

                                                             = 529 torr

So the final pressure = 529 torr
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