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Consider the Following Reaction at a Certain Temperature

Question 46

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 PCl5(g) ,PCl3(g) ,and Cl2(g) is added,what is the equilibrium concentration of PCl5(g) ?


A) 0.65 M
B) 4.35 M
C) 1.35 M
D) essentially zero
E) 2.35 M

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