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The energy of one mole of photons of radiation of wavelength 300 nm is (Given h = 6.63 × 10 –34 Js, N A = 6.02 × 10 23 mol –1 , c = 3 × 10 8 ms –1 )

1. 235 kJ mol –1
2. 325 kJ mol –1
3. 399 kJ mol –1
4. 435 kJ mol –1

Correct answer: 399 kJ mol –1

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