Which of the following is an example of a chemical reaction? i. sodium bicarbonate neutralizes acid in a patient's stomach, relieving stomach pain. ii. the cells in a human body metabolize nutrients, providing energy for cellular processes. iii. a chef heats egg whites to make an omelet, denaturing the proteins of the egg. iv. a car engine combines oxygen and fuel to produce energy, enabling the car to run.

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.