Advanced Placement (AP), 04.12.2020 03:40 tremainewoodley3030
A student uses visible spectrophotometry to determine the concentration of CoCl2(aq) in a sample solution. First the student prepares a set of CoCl2(aq) solutions of known concentration. Then the student uses a spectrophotometer to determine the absorbance of each of the standard solutions at a wavelength of 510nm and constructs a standard curve. Finally, the student determines the absorbance of the sample of unknown concentration.
A wavelength of 510nm corresponds to an approximate frequency of 6×1014s−1. What is the approximate energy of one photon of this light?
9×1047J
3×1017J
5×10−7J
4×10−19J
Answers: 3
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A student uses visible spectrophotometry to determine the concentration of CoCl2(aq) in a sample sol...
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