Which of the following best explains the Law of Conservation of Mass? Group of answer choices:

A. In a chemical reaction the mass of the products is less than the reactants mass.

B. In a chemical reaction the mass of the products cannot be determined from the mass of the reactants.

C. In a chemical reaction mass of products always equals the mass of reactants.

D. In a chemical reaction the mass of the products is greater than the mass of reactants

Nitric acid can be formed in two steps from the atmospheric gases nitrogen and oxygen, plus hydrogen prepared by reforming natural gas. in the first step, nitrogen and hydrogen react to form ammonia: (g) (g) (g) in the second step, ammonia and oxygen react to form nitric acid and water: (g) (g) (g) (g) calculate the net change in enthalpy for the formation of one mole of nitric acid from nitrogen, hydrogen and oxygen from these reactions. round your answer to the nearest .