What is the energy of a mole of photons with a frequency of 6.9 * 10¹⁴ Hz? A) 2.8 * 10⁵J/mol B) 8.3 * 10⁴J/mol C) 8.3 * 10^-4J/mol D) 3.8 * 10⁶J/mol E) 2.8 *10^-6J/mol

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Quizplus · Accepted Answer

The energy of a photon is given by E = hν, where h is Planck's constant (6.626 x 10^-34 J·s) and ν is the frequency. For a mole of photons, multiply by Avogadro's number (6.022 x 10^23 mol^-1). E = (6.626 x 10^-34 J·s)(6.9 x 10^14 Hz)(6.022 x 10^23 mol^-1) = 2.8 x 10^5 J/mol.

What Is the Energy of a Mole of Photons with a Frequency