22. To test a spectrophotometer's accuracy, a solution of 60.06 ppm K2Cr2O7 isprepared and analyzed. This solution has an expected absorbance of 0.641 at350.0 nm. Several aliquots of the solution produce the following absorbancevalues.0.640 0.638 0.640 0.639 0.640 0.639 0.638is there any significant difference between the experimental mean and the expectedvalue at a 99.9% confidence level?Yes because tcal>tcriticalYes because tcaltcriticalNo because tcal

Suppose to test a spectrophotometer's accuracy, a solution of 60.06 ppm K2Cr2O7 is prepared and…

To test a spectrophotometer's accuracy, a prepared and analyzed. This solution has 350.0 nm. Several aliquots of the solution values. 0.638 0.640 0.639 0.640 0.639 0.638 e any significant difference between the e at a 99.9% confidence level? s because tcal>tcritical

To test a spectrophotometer's accuracy, a prepared and analyzed. This solution has 350.0 nm. Several aliquots of the solution values. 0.638 0.640 0.639 0.640 0.639 0.638 e any significant difference between the e at a 99.9% confidence level? s because tcal>tcritical

Intro Spectroscopy

5th Edition

ISBN:9781305221796

Author:PAVIA

Publisher:PAVIA

Chapter10: Ultraviolet Spectroscopy

Section: Chapter Questions

Problem 1P

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Question

22. To test a spectrophotometer's accuracy, a solution of 60.06 ppm K2Cr2O7 is
prepared and analyzed. This solution has an expected absorbance of 0.641 at
350.0 nm. Several aliquots of the solution produce the following absorbance
values.
0.640 0.638 0.640 0.639 0.640 0.639 0.638
is there any significant difference between the experimental mean and the expected
value at a 99.9% confidence level?
Yes because tcal>tcritical
Yes because tcal<tcritical
No because tcal>tcritical
No because tcal<tcritical

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