State two differences between an element and a compound.

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 .

Did the detergents containing enzymes work better at removing stains than those containing no enzyme? why or why not?

What factor besides temperature affects the boiling point of water? a. mass b. number of moles c. volume d. pressure