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The reversible, gas-phase reaction, 2A->B is in equilibrium in a piston-cylinder at 3.5-bar pressure. At equilibrium,...

The reversible, gas-phase reaction, 2A->B is in equilibrium in a piston-cylinder at 3.5-bar pressure. At equilibrium, the system contains 2.0 mol A and 3.0 mol B. When 5.0 mol of an inert gas are added to the system, how many moles of B are present at equilibrium? The pressure and temperature do not change. Assume ideal gases.

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