When iron reacts with moist air to form rust, an ionic compound results because
select one:
a. oxygen needs two more electrons to complete its octet
b. oxygen is a diatomic gas that forms double bonds with itself
c. iron transfers its electrons to oxygen due to a large difference in electronegativity
d. iron is a transition metal that easily allows electrons to move through it

What is the independent variable in this investigation? mass volume sample number substance density

If an area has high air pressure and low humidity, what type of weather will it most likely have? plz !

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 .