Suppose 50

question 96

Multiple Choice

Suppose 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. What is the mass of N₂O₄ in the final equilibrium mixture?

• A) 39.5 g
• B) 35.3 g
• C) 30.3 g
• D) 25.2 g
• E) 43.7 g

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