How do you draw the lewis structure of pcl2f3?

The grooves or folds of the brain are called

  the mississippians were considered to be  horticulturalists, which means they were

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.