Two moles (2.0 mol) of ideal gas at 8.0 × 105 Pa are contained in an cylinder with a movable piston.  The cylinder contraption is immersed in boiling water so as to keep it at a constant temperature. i) What is the pressure if 1.0 mole of the gas is vented out of the contraption without moving the piston?  a) 2.0 × 105 Pa b) 4.0 × 105 Pa c) 6.0 × 105 Pa d) 8.0 × 105 Pa

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