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Question

Find Energy of one mole proton if λ for photon is 331˙A.

Solution
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Wavelength of photon =331A
(λ)=331×1010m
Energy of one photon E=hcλ=6.62×1034×3×1083.31×1010=6×1016J
Energy of one mole of protons =E×NA=6×1016×6.023×1023=36.138×1073.6×108

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