An amount of 1.75 × 10^-4 mole of decomposes by the absorption of photons of wavelength 2500 Å. If one molecule is decomposed per absorbed photon, the total energy absorbed is (NA × h × c = 0.12)

Question

An amount of 1.75 × 10^-4 mole of $HI$ decomposes by the absorption of photons of wavelength 2500 Å. If one molecule is decomposed per absorbed photon, the total energy absorbed is (NA × h × c = 0.12)

Prashant Kotian · Accepted Answer

Correct answer: D. E_total = n × N_A × hc/λ = (1.75 × 10^-4 / (2.5 × 10^-7)) × (N_A × h × c) = 700 × 0.12 = 84 J.

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