An inorganic who studies the reactions of phosphorus halides mixes .105 mol pcl5 with .045 mol cl2 and .045 mol of pcl3 in a 500 ml flask at 250c. the reaction is pcl5 pcl3+cl2. the equilibrium constant for the reaction is 4.2 x 10 -2 calculate the reaction coefficient and determine in which direction the reaction is moving.