When Radiation of Wavelength 495 Nm from a Monochromatic Flash

Multiple Choice

When radiation of wavelength 495 nm from a monochromatic flash lamp of power 0.500 kW is used to irradiate a low-pressure sample of iodine vapour, I₂, the rate of production of iodine atoms is 3.24  10¹⁹ s^-1. Assuming that all of the photons emitted by the lamp are absorbed by the iodine vapour, calculate the quantum yield for dissociation of iodine molecules.

A) 0.026
B) 0.070
C) 0.052
D) 0.013