determine the energy of 1.70 mol of photon for infrared radiation(1420 nm) in kj.

i tried doing this question using the relation E = hc/wavelength but the photon they give is in mols and im not quiet sure on how to determine the energy of 1.70 mols of poton.

any help is appreciated, ty

1 mol of anything is 6.02 \times 10^{23} of the things. You have the energy of a single photon, so all you need to do is calculate the energy of 1.70 mol of them.