Question

A photon of ultraviolet (UV) light possesses enough energy to mutate a strand of human DNA. What is the energy of a single UV photon having a wavelength of 24 nm?
What is the energy of a mole of UV photons having a wavelength of 24 nm?

Answer 1

E = h*c/wavelength.
You know h, c, and wavelength. Calculate E (in Joules).
E of a mol is the above E x 6.02 x 10^23 photons/mole.
Post your work if you get stuck.

Answer 2

IM STUCK..what did u get as a answer?

Answer 3

I didn't work it. I just told you how to work it.
What is your problem? You know h,c, and wavelength. h is Planck's constant, c is speed of light, wavelength is given. Change that to meters before using it. Plug and chug!

Answer 4

I'm going to bed but if you will tell me what your problem is (what you don't understand about the formula or the numbers) I will take care of it first thing in the morning. Of course, another tutor may help you before morning (or perhaps very early in the morning).

Answer 5

wtf