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1Visible light, which represents only a small part of the electromagnetic spectrum, occurs between wavelengths of ________ and ________ nanometers.
A)120; 700
B)10; 400
C)380; 1100
D)380; 700


2List two types of radiation of the electromagnetic spectrum other than visible light. Which has more energy?


3What does a spectrophotometer measure?


4When using a spectrophotometer, the higher the concentration of a chemical, the higher the transmittance.
A)True
B)False


5


blank
6


filter
7


sample
8


light source
Answer choices:
A)a white light that is a combination of all visible wavelengths
B)a solvent in a cuvette used to calibrate the spectrophotometer for comparison with the sample
C)device that allows the selection of a specific wavelength to pass through the sample
D)a solution contained in a cuvette


9________ is the amount of radiation passing through a sample.


10________ is the amount of radiation retained by the sample.


11How will you graphically represent the absorbance of a sample such as CoCl2?


12What is a standard curve?


13What are the consequences of forgetting to take a measurement of the blank?


14When constructing a standard curve, which is the dependent variable?
A)absorbance
B)concentration of a chemical
C)wavelength
D)light intensity


15Chlorophyll absorbs predominately ________-colored and ________-colored light in two narrow bands of the spectrum and reflects ________ light in the middle of the spectrum.





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