Question

how much energy is contained in one mole of xray photons with a wavelength of 0.155nm?

Answer 1

We can find the energy of one photon:
\[E = \frac{hc}{\lambda}\]

Answer 2

Where 'h' is Planck's Constant, 'c' is the speed of light, and lambda is the wavelength in meters.

Answer 3

Thank you!

Answer 4

But that's only the energy of one photon. To get the energy of a whole mole, you could have to multiply by Avogadro's Number.
\[(energy_{photon})*(6.022*10^(23) \frac{photons}{mol})\]

Answer 5

Do the units for energy have to be in kJ/mol?

Answer 6

Um, yeah they can be. When you find the energy of that one photon, it'll be in Joules. When you find the energy of ALL the photons at first, it'll be in J/mol. Then, you would have to convert to kJ/mol.