Frequency and wavelength

Kc = 0.040 for the system below at 450oc. if a reaction is initiated with 0.40 mole of cl2 and 0.40 mole of pcl3 in a 2.0 liter container, what is the equilibrium concentration of cl2 in the same system? pcl5(g) ⇄ pcl3(g) + cl2(g)

0.2348 grams of pbcl2 used to form 44.0 ml of solution.

Complete each row of the table below by filling in the missing prefix or missing exponent.