At 800 K,K_c for the Following Equilibrium Is 4

question 67

Multiple Choice

At 800 K,K_c for the following equilibrium is 4.2 × 10^-3.
2HgO(s)
2Hg(l) + O₂(g)
Suppose 82.3 g of mercury (II) oxide is placed in a sealed 2.50-L vessel at 800 K.What is the partial pressure of oxygen gas at equilibrium? (R = 0.0821 L ∙ atm/(K ∙ mol) )

• A)8.7 atm
• B)4.3 atm
• C)0.27 atm
• D)0.0042 atm
• E)22 atm

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