The DRT value for the contact lens disinfectant Chlorhexidine (0.005%) against S. aureus is 3.2 min. What is the minimum time that lenses with 1012 S. aureus cells should be soaked in Chlorhexidine (0.005%)

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.