What is the unit of absorbance?   b)When he exponential trend line of iron concentration vs time is y=4.2 exp(-0.24x) x is time in min and y is concentraion of phen iron complex solution.   c)Explain the relationshipp between temperature vs decay constant and temperature vs half life.   d) The concentration of iron in solution a is 5 mg/l. A total volume of solution a is 10 mL in beaker. If 20ml of phenanthroline solution is added into the solution A beaker. Wha is the final concentration of ionafter two solutions are mixed.

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UV Visible Spectroscopy

Spectroscopy refers to the absorption or emission of light or other radiations by matter. When a substance or chemical absorbs light or radiation, they reach an excited state followed by de-excitation or emission of the light or radiation forming distinct spectra. UV-visible spectroscopy or  ultraviolet-visible refers to the absorption and emission in the ultraviolet and visible regions of the electromagnetic spectrum.