Anonymous

# how much energy is contained in 1 mole of gamma rays...?

with a wavelength of 2.57 x 10^-5

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• Anonymous

1 mole of gamma rays contains 6.02 x 10^23 particles. That's Avogadro's constant.

The formula for energy E = nhf.

n = number of particles

h = Planck's constant

f = frequency

Note that since c = f (lambda) where c denotes the speed of light and lambda denotes wavelength, the formula can be rewritten as E = nhc/(lambda)

Thus energy = 6.02 x 10^23 x 6.63 x 10^-34 x 3.0 x 10^8 x 2.57 x 10^-5

which gives us E = 3.0773 x 10^-6 (5 sf)

Hope I was of help!

<3, phantasmal.spirit