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Be sure to answer all parts. A 2.47-L flexible flask at 18°C contains a mixture of...

Be sure to answer all parts.

A 2.47-L flexible flask at 18°C contains a mixture of N2, He, and Ne at partial pressures of 0.257 atm for N2, 0.155 atm for He, and 0.437 atm for Ne.

(a) Calculate the total pressure of the mixture.

(b) Calculate the volume in liters at STP occupied by He and Ne if the N2 is removed selectively.

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