The Brown Gas NO₂ and the Colorless Gas N₂O₄ Exist

question 82

Multiple Choice

The brown gas NO₂ and the colorless gas N₂O₄ exist in equilibrium, 2NO₂ N₂O₄. In an experiment, 0.625 mole of N₂O₄ was introduced into a 5.00 L vessel and was allowed to decompose until equilibrium was reached. The concentration of N₂O₄ at equilibrium was 0.0750 M. Calculate K_c for the reaction.

• A)7.5
• B)0.125
• C)0.0750
• D)0.10
• E)0.050