What is the energy in joules of a mole of photons with the energy of the 434 nm spectral line of hydrogen? A)2.76 × 10⁵J B)9.21 × 10^-4J C)2.76 × 10^-4J D)5.78 × 10^-25J E)434J

Question

Quizplus · Accepted Answer

The energy of a single photon is calculated using E = hc/λ. For 434 nm, E = (6.626 × 10^-34 Js)(3 × 10^8 m/s) / (434 × 10^-9 m) = 4.58 × 10^-19 J. For a mole of photons, multiply by Avogadro's number (6.022 × 10^23), resulting in approximately 2.76 × 10^5 J.

What Is the Energy in Joules of a Mole of Photons