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Unformatted text preview: 1.167 g/mL . Find the molality (not molarity) of this solution. 4. A standard solution of K 2 Cr 2 O7 is known to have an absorbance of 0.640 at a given wavelength. Several aliquots of this solution were prepared to test the accuracy of a particular spectrophotometer. The following results were obtained: 0.639, 0.638, 0.639, 0.640, 0.640, 0.639, 0.638, 0.637 What is the accuracy of the instrument at the 99% confidence level?...
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- Fall '10