The energy of one mole of photons of radiation of wavelength 400 nm (give $\text{h=6.63}\times {\text{10}}^{-34}\text{\hspace{0.17em}Js}$${\text{N}}_{\text{A}}\text{=6.02}\times {\text{10}}^{23}{\text{\hspace{0.17em}mol}}^{-1}$; $\text{C=3}\times {\text{10}}^8{\text{\hspace{0.17em}mol}}^{-1}$) (J+E)