At 80 oC, Kc = 1.87 Ã 10-3 for the reaction (a) Calculate the equilibrium concentrations of

Question:

At 80 oC, Kc = 1.87 Ã— 10-3 for the reaction

(a) Calculate the equilibrium concentrations of PH3 and BCl3 if a solid sample of PH3BCl3 is placed in a closed vessel at and decomposes until equilibrium is reached.
(b) If the flask has a volume of 0.250 L, what is the minimum mass of PH3BCl3(s) that must be added to the flask to achieve equilibrium?