APFIVE Equilibrium Concentration from Initial Conditions
For the equilibrium $$CO(g) + Cl_2(g) \rightleftharpoons COCl_2(g)$$ with $$K_c = 10$$, what is the equilibrium concentration of $$COCl_2$$ if initial concentrations are $$[CO] = 0.5\,M$$ and $$[Cl_2] = 0.5\,M$$?
A
0.10 M
B
0.45 M
C
0.05 M
D
0.25 M
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