Return to page 6 Question 6 (1 point)
Which of the following represents isotopes of the same element? The letters represent the element (0=Oxygen)
A. 1609 and 1708
B. 160, and 160g
C. 1607 and 1879
D. 40ca20 and 30P15

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 .