What is the energy in joules of a mole of photons associated with visible light of wavelength 486 nm? (c = 3.00 × 10⁸ m/s; h = 6.63 × 10^-34 J • s; NA = 6.0²² × 10²³ moles^-1) A)6.46 × 10^-1⁶ J B)6.46 × 10^-25 J C)2.46 × 10^-4 J D)12.4 kJ E)246 kJ

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Quizplus · Accepted Answer

The energy of a single photon is calculated using E = hc/λ. For a mole of photons, multiply by Avogadro's number (NA). E = (6.63 × 10^-34 J·s)(3.00 × 10^8 m/s) / (486 × 10^-9 m) × (6.022 × 10^23 mol^-1) = 246 kJ.

What Is the Energy in Joules of a Mole of Photons