The total pressure of the mixture of the nobles gases in the container is determined as 9 atm.
The total pressure of the gasses is equal to the total pressure of the container.
Pt = P1 + P2 + P3
Pt = 1 atm (neon) + 2 atm (Argon) + 6 atm( xenon)
Pt = 9 atm
Thus, the total pressure of the mixture of the nobles gases in the container is determined as 9 atm.
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