Sodium bicarbonate and acetic acid are combined using two methods. The first method occurs in a cup. The second method occurs in flexible, sealed vessel. The initial mass of method 1 was 2.5 g and its final mass was 0.75 g. The initial mass of method 2 was 2.5 g and its final mass was 2.5 g. Provide a complete, balanced equation for the reaction that takes place. Explain how the methods relate to the law of conservation of mass/energy. Make sure you include the definition of the conservation of mass/energy in your answer.