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Chemistry Level 4

Iodine molecule dissociates into atoms after absorbing light of 450 \(\text{nm}\). If one quantum of radiation is absorbed by each molecule, calculate the kinetic energy of each iodine atom.

If it can be written as \(a \times 10^b \text{ J}\) where \(0 \leq a <10\), find the value of \(\lfloor a \rfloor |b|\).

Details and Assumptions

\(c= 3.0 \times 10^{8} \text{ m/s} \\ h = 6.63 \times 10^{-34} \text{ Js} \\ 1 \text{ mol}= 6.02 \times 10^{23} \text{ entities} \\ \text{Bond energy of }\ce{I_2}= 240 \text{ kJ mol}^{-1}\)


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