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Consider the Following Reaction at a Certain Temperature

Question 79

Multiple Choice

Consider the following reaction at a certain temperature:
PCl5(g) →PCl3(g) + Cl2(g)
Kc = 0.100
At equilibrium,[PCl5] = 2.00 M and [PCl3] = [Cl2] = 1.00 M.If suddenly 1.00 M PCl3(g) and Cl2(g) is added,what is the equilibrium concentration of PCl5(g) ?


A) essentially 4.00 M
B) 0.58 M
C) 2.58 M
D) 3.42 M
E) 1.42 M

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