Question: how much energy in kj is carried by one mole of photons?
Answer: Multiply by Avogadro's Number Therefore, the value calculated in the previous step is the energy of one particle; multiply it by Avogadro's number to determine the energy of one mole. (3.9 x 10^-19)*( 6.02 x 10^23)= 2.3 x 10^5 joules.