The mole fraction of urea (MW = 60.0 g/mol) in a solution prepared by dissolving 45 g of urea in 50 g of H20 is O a. 0.013 Ob.0.21 O.0.17 Od. 0.55 O.9.1

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Photochemistry

Photochemistry is the part of chemistry that studies the various mechanisms of reactions that are triggered by the presence of light energy. It also helps to study the changes involved in a molecule that can undergo the absorption of radiation.