Answer:
[tex]E=1.56\times 10^{10}J[/tex]
Explanation:
The energy of a photon, E, can be calculated with the Planck-Einstein equation:
[tex]E=hf[/tex]
Where:
- h is Planck's constant 6.626×10⁻³⁴ J.s, and
- f is the frequency of the photon or electromagnetic radiation.
Substituting with your data:
[tex]E=6.626\times 10^{-34}J.s\times 3.91\times 10^{19}s^{-1}=2.5908\times 10^{-14}J[/tex]
Now multiply by Avogadro's number to obtain the energy of one mole of photons:
[tex]E=2.5908\times 10^{-14}J\times 6.022\times 10^{23}=1.56\times 10^{10}J[/tex]
