Question

Question #fa5ff

Answer 1

Well, Amana probably I am wrong but I thought this:
From Einstein's relationship you get the energy: `E=h*nu` where `nu` is the frequency and `h` is Plank's Constant.
In a mole you have an Avogadro's number `N_A` of elements so you get:
`E=h*nu=h*c/lambda=(6.63xx10^-34)*(3xx10^8)/(2.49xx10^-14)=7.98xx10^-12J~=8.0xx10^-12J`

If `N_A=6.023xx10^23` number of elements/mol
I got `8.0xx10^-12*6.023xx10^23=4.8xx10^12 (kJ)/(mol)`

Check it because I am not completely sure! :-)