A student mixes two solutions A and B. A is blue colored and B is yellow colored. The mixture produces has a green color. A thermometer shows no temperature changes. The student observers no other facts What answer best applies ? A. Physical Change
B. chemical change , exothermic
C. physical change , exothermic
D. physical change , endothermic

Chlorine and water react to form hydrogen chloride and oxygen, like this: 2cl2 (g) + 2h2o (g) → 4hcl (g) + o2 (g) also, a chemist finds that at a certain temperature the equilibrium mixture of chlorine, water, hydrogen chloride, and oxygen has the following composition: compound concentration at equilibrium cl2 0.55m h2o 0.57m hcl 0.53m o2 0.34m calculate the value of the equilibrium constant kc for this reaction. round your answer to 2 significant digits.