What determines whether a metamorphic rock is foliated or non-foliated?
the presence or absence of mineral crystals
the water content as a percentage of the rock volume
the number of remaining gas molecules
temperature, pressure, and the original type of rock

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 .