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PCAT Chemical Processes – Argon Gas Pressure
 by
 Apr 19, 2018
 PCAT Question of the Day
A sample of argon gas is initially contained in an 18liter aluminum tank at a pressure of 90 atm. If half of the gas molecules are allowed to slowly escape from the tank, such that temperature does not change significantly, what is the pressure of the remaining gas?
A. 9 atm
B. 18 atm
C. 45 atm
D. 90 atm
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