500 G of N₂O₄ Is Introduced into an Evacuated 2

question 17

Multiple Choice

50.0 g of N₂O₄ is introduced into an evacuated 2.00 L vessel and allowed to come to equilibrium with its decomposition product, N₂O₄(g) ⇌ 2NO₂(g) . For this reaction K_c = 0.133. Once the system has reached equilibrium, 5.00 g of NO₂ is injected into the vessel, and the system is allowed to equilibrate once again. Calculate the mass of NO₂ in the final equilibrium mixture.

• A) 17.8 g
• B) 12.4 g
• C) 14.7 g
• D) 19.7 g
• E) 15.5 g

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