A researcher studies the equilibrium system SbCl5(g) SbCl3(g) + Cl2 (g), finding that at equilibrium, there was 5.99 grams of antimony…

A researcher studies the equilibrium system SbCl5(g) <<<<<<>>>>>>>SbCl3(g) + Cl2 (g), finding that at equilibrium, there was 5.99 grams of antimony pentachloride, 15.22 grams antimony trichloride, and 4.87 grams of Chlorine in a 5.00-L flask. She then evacuated the container and added 20.00 grams of antimony pentachloride. What mass of each species will be present at equilibrium?