The iodine molecule can be photodissociated (broken apart with light) into iodine atoms in the gas phase with light of wavelengths shorter than about 792 nm. A 130.0 mL glass tube contains 50.1 mtorr of gaseous iodine at 23.0 oC.
What minimum amount of light energy must be absorbed by the iodine in the tube to dissociate 16.0 % of the molecules?
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