Sodium street lamp gives off a characteristic yellow light of wave length $588\;nm$ calculate the energy mole (in KJ/mol) of these photons .

Question

$\begin{array}{1 1} (a)\;8.04 \times 10^{2}\;KJ mol^{-1} \\ (b)\;3.04 \times 10^{2}\;KJ mol^{-1}\\ (c)\;2.04 \times 10^{2}\;KJ mol^{-1}\\(d)\;1.04 \times 10^{2}\;KJ mol^{-1}\end{array} $