What is the wavelength in nanometers of light with a frequency of 7.8 * 1015 Hz?

Matches the chemical name of each oxide of phosphorus to its chemical formula

Nan element’s square on the periodic table, the number with the greatest numerical value represents the

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 .