Determine the energy (in J to 3 sig figs) of 1.66 moles of photons which have an energy of 4.88 x 10^{-19} J per photon.

Please note that 1.6 moles of photons are 1.6*6.022 *10^23 photons or:

9.64*10^(23) photons, so the total amount of energy is:

9.64*10^(23)* 4.88*10^(-19)=4.7 * 10^5 Joules

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