APFIVE Reaction Quotient and Equilibrium Shift
For the reaction $$\mathrm{A(g) + 2B(g) \rightleftharpoons 3C(g)}$$, the equilibrium constant is $$K_c = 0.25$$ at a certain temperature. A mixture is prepared with initial concentrations of $$[A] = 0.10~\mathrm{M}$$, $$[B] = 0.20~\mathrm{M}$$, and $$[C] = 0.15~\mathrm{M}$$. What will be the approximate concentration of C when the system reaches equilibrium?
A
Cannot be determined without reaction rates
B
Less than 0.15 M
C
Greater than 0.15 M
D
0.15 M
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