Can someone please help?

Question

How much total energy is emitted from a collection of 2.50 moles of H atoms if each atom is emitting a photon with a wavelength of 96.7 nm?

I believe you must first use wavelength=plank constant/ mass of object times velocity, then use energy=plank constant times frequency.

Thank you

Answer 1

frequency = c / 96.7 nm

E = h * f * 2.50 * 6.02e23