A rigid tank contains 1.80 moles of an ideal gas. Determine the number of moles of gas that must be withdrawn from the tank to lower the pressure of the gas from 27.9 atm to 4.80 atm. Assume the volume of the tank and the temperature of the gas remain constant during this operation.
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Hints* Boyle's Law
Using P=(RnT)/V, where T=1(arbitrary constant), and R = 8.314: Calculate volume at initial condition. Use this volume and final pressure to calculate n final. Subtract n final from n inital.
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