The following gas-phase reaction takes place in a closed, constant-volume batch reactor at isothermal (constant temperature) conditions. 2CO+O2→2CO2 Initially, the reactor contains 0.564 kmol of CO, 1 kmol of O2, 1 kmol of CO2, and 0.5 kmol of N2 at a total pressure of 5 atm. At time t, the reactor pressure is 4.5 atm. Assuming ideal gas behavior, what is the extent of reaction (in kmol) at time t?

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