The volume between the 50.00 mL mark and the valve of a buret is 6.19 mL. The buret reading of an upside-down buret containing a pocket of hydrogen gas is 32.17 mL. What is the total volume of hydrogen in the buret?

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 .