What is Avogardro's number? the number of atoms in exactly 14.00 g of carbon-12, the number of atoms in a kilogram of any substance, the number of atoms, molecules, ions, formula units, or other particles in a mole of a substance, the number of atoms, molecules, ions, formula units, or other particles in a gram of a substance

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 .