What is the function of a control group in an experiment? A. It is the group that always changes
B. To check the validity of an experiment
C. To test on the hypothesis of an experiment
D. It is the group that never changes

Amixture initially contains a, b, and c in the following concentrations: [a] = 0.300 m , [b] = 1.05 m , and [c] = 0.550 m . the following reaction occurs and equilibrium is established: a+2b⇌c at equilibrium, [a] = 0.140 m and [c] = 0.710 m . calculate the value of the equilibrium constant, kc.