The decomposition of no2(g) occurs by the following bimolecular elementary reaction.
2 no2(g) → 2 no(g) + o2(g)

the rate constant at 273 k is 2.3 ✕ 10-12 l/mol · s, and the activation energy is 111 kj/mol. how long will it take for the concentration of no2(g) to decrease from an initial partial pressure of 2.8 atm to 1.2 atm at 495 k? assume ideal gas behavior.