Light of wavelengths shorter than 275 nm can be used to photodissociate the hydrogen molecule into hydrogen atoms in the gas phase. A 70.0 mL glass cylinder contains H, (g) at 65.0 mtorr and 25 °C. What minimum amount of light energy must be absorbed by the hydrogen in the tube to dissociate 26.0% of the molecules? 0.277 energy absorbed: Incorrect

Bromine is used in the manufacture of disinfectant products, it has a very strong oxidizing character, due to the great electronic affinity it presents. Based on therefore, what will be the electron affinity in kJ/mol of bromine from the following equations?. Explain the development.

If Li(s) is exposed to F2(g), how would the electrons rearrange? Write a balanced chemical equation and explain why it occurs by comparing the Zeff of Li vs. F.

Assuming the wavelength for fluorescence is observed at 475 nm and the wavelength of the phosphorescence process occurs at 523 nm, find the energy released from 12.35 g of Calcium atoms. (Assume that there is 1 excited electron per calcium atom and every one of them relaxes via the processes above.) (Fluorescence occurs 2.45 times more frequently than phosphorescence)