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

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Chapter1: Chemical Foundations
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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
Transcribed Image Text: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
Francis A. Santos
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.
A 7.24 + 0.74%
B) 7.24 + 0.27%
7.24 + 0.13%
7.24 + 0.42%
Transcribed Image Text:Francis A. Santos 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. A 7.24 + 0.74% B) 7.24 + 0.27% 7.24 + 0.13% 7.24 + 0.42%
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