Which element is correctly paired with a possible combination of subatomic particles? (AKS 1b/DOK 2) A.
Fluorine: 8 protons, 9 electrons, 10 neutrons

B.
Barium: 56 protons, 56 electrons, 81 neutrons

C.
Carbon: 12 protons, 12 electrons, 12 neutrons

D.
Helium: 4 protons, 2 electrons, 2 neutrons

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.