Question

Calculate the energy present in one mole of quanta of Indio light with wavelength 430 nm

Answer 1

$E=\frac{hc}{λ}=\frac{6.626\times10^{-34}\times 2.998\times 10^8}{430\times10^{-9}}=4.62\times10^{-19} J$

in one mole:

$E(1 mole)=4.62\times10^{-19}J \times 6.022\times10^{23}= 2.78\times10^5 J$