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. ii) If, after 1.0 mole of the gas is vented out of the contraption without moving the piston, the volume is halved (by moving the piston), then what is the pressure?  a) 2.0 × 105 Pa b) 4.0 × 105 Pa c) 6.0 × 105 Pa d) 8.0 × 105 Pa

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