Equilibrium: What direction?

You have a reaction mixture and want to determine if equilibrium has been reached, or, if not, the direction (toward products or reactants) that the reaction will proceed. The reaction is:

A + B ---> 2C
and Kc for this reaction is 1.

You measure the concentrations of A, B and C, but you forget to label which concentration belongs to each species. The concentrations that you measure are:

MeasurementConcentration
10.2M
20.05M
30.1M

Assign the concentration measurements to A, B or C if:

Click on the row for the correct answer!***A******B******C***
the reaction is at equilibrium           
the reaction will go towards reactants           
the reaction will go toward products           

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