Which of the following is a correct practice in handling reagents?A Return any excess reagent to its source container.B Clean up any spills after finishing the laboratory work© Never insert spatulas, spoons, or knives into a bottle containing solid chemicalsD Dispose any liquid chemicals in the sink Francis A. SantosA chemist obtained the following data for the percent compound Z in triplicates (n=3) of an insecticide preparation: 7.47, 6.98, and7.27. Calculate the 90% confidence limit for the mean of the data assuming that only information about the precision of the methodis the precision for the three data points.A 7.24 + 0.74%B) 7.24 + 0.27%7.24 + 0.13%7.24 + 0.42%

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Which of the following is a correct practice in handling reagents? A Return any excess reagent to its source container. B Clean up any spills after finishing the laboratory work Never insert spatulas, spoons, or knives into a bottle containing solid chemicals D Dispose any liquid chemicals in the sink

Which of the following is a correct practice in handling reagents? A Return any excess reagent to its source container. B Clean up any spills after finishing the laboratory work Never insert spatulas, spoons, or knives into a bottle containing solid chemicals D Dispose any liquid chemicals in the sink

Appl Of Ms Excel In Analytical Chemistry

2nd Edition

ISBN:9781285686691

Author:Crouch

Publisher:Crouch

Chapter2: Basic Statistical Analysis With Excel

Section: Chapter Questions

Problem 12P

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A chemist obtained the following data for the percent compound Z in triplicates (n=3) of an insecticide preparation: 7.47, 6.98, and 7.27. Calculate the 90% confidence limit for the mean of the data assuming that only information about the precision of the method is the precision for the three data points.
An analyst obtained the following data for the percent compound Z in triplicates (n=3) of an insecticide preparation: 7.47, 6.98, and 7.27. Calculate the 90% confidence limit for the mean of the data assuming that only information about the precision of the method is the precision for the three data points.
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