Sterling silver is a solid solution of silver and copper. If a piece of a sterling silver necklace has a mass of 120.0 g and a volume of 11.57 ml, calculate the mass percent of copper in the piece of necklace. Assume that the volume of silver present plus the volume of copper present equals the total volume. (Density of Cu = 8.96 g/cm; density of Ag = 10.5 g/cm.) mass of copper total mass Mass percent of copper= x 100 Mass percent of copper =

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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.