B. Write the oxidation half-reaction and reduction for the following: 16. Mg + H+ 17. Kl + Cl2 > Mg2+ + H2 KCl + I2 Mn2+ + Fe3+ + H2O Cr042-+ Br-+ H2O +I2 18. Mn04 1-+ H+ + Fe2+ 19. Crl3 + Br03¯+ OH- - 20. Ag+ + Mg Ag + Mg2+

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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.