Question

The iodine molecule can be photodissociated into iodine atoms in the gas phase with light of wavelengths shorter than about 794 nm . A 100.0 mL glass tube contains 55.1 mtorr of gaseous iodine at 16.0 ∘C.

What minimum amount of light energy must be absorbed by the iodine in the tube to dissociate 14.0 % of the molecules?

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