Question

NASA detected a burst of gamma rays from a neutron star in space. The gamma radiation had a frequency of 1.0 × 1019 Hertz and the burst released a total of 1.0 × 1044 J of energy. How many moles of photons of gamma radiation were released during this burst?

Answer 1

Answer:

1.51×10^58 moles of photons

Explanation:

n = E/hf

E is total energy = 1×10^44 J

h is Planck's constant = 6.634×10^-34 Js/mol

f is frequency of radiation = 1×10^19 Hz (1×10^19 s^-1)

n = 1×10^44/(6.634×10^-34 × 1×10^19) = 1×10^44/6.634×10^-15 = 1.51×10^58 moles of photons