At a particular temperature the first-order gas-phase reaction N2O5→ 2NO2 + 1/2O2 has a half-life for the disappearance of dinitrogen pentoxide of 5130 s. Suppose 0.450 atm of N2O5 is introduced into an evacuated 2.00 L flask. What will be the total gas pressure inside the flask after 3.00 hours?
◦ 0.969 atm
◦ 0.105 atm
◦ 0.795 atm
◦ 1.14 atm
◦ 0.864 atm