HLP ASAP WILL AWARD BRAINLIEST Calculate the wavelength of a photon that has an energy of 8.15x10^-20J

E=hv
Lambda=c/v

h=6.626x10^-34J. s
c=3.00x10^8m/s

A. 2.44x10^3nm
B.1.25x10^23nm
C. None of these
D. 1.25x10^5nm
E. 4.11x10^2nm

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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 .

Choose all the answers that apply. fluorine (f) has an atomic number of 9 and an atomic weight of 18.99. fluorine has a. 9 protons b. 10 neutrons c. 18 electrons d. an atomic mass of 19 e. at least one isotope