Question

How much energy (in joules) is contained in one mole of photons (electromagnetic quanta) of frequency 8.2E+9 Hz

Answer 1

@Australopithecus

Answer 2

We have \(E=N_A\times E_{photon}=N_A\times h\nu\).

\(N_A\) is a constant, the Avogadro's number, \(6.022\times 10^{23}\).
\(h\) is also a constant, Planck's constant, \(6.626\times 10^{-34}(J.s)\).
\(\nu\) is the frequency of photon.

Now you can easily calculate the answer.