Consider the gas phase reaction N₂O₄ ↔ 2NO₂ occurring in an isothermal and isobaric reactor maintained at 298 K and 1.0 bar. The standard Gibbs energy change of the reaction at 298 K is ΔG°₂₉₈=5253 J mol^-1. The standard states are those of pure ideal gases at 1.0 bar. The equilibrium mixture in the reactor behaves as an ideal gas. The value of the universal gas constant is 8.314 J mol^-1K^-1. If one mole of pure N₂O₄ is initially charged to the reactor, the fraction of N₂O₄ that decomposes into NO₂ at equilibrium is