intro to measurement

# intro to measurement - Chem104A Lab Report Chapter...

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Chem104A Lab Report Chapter 6- “Introduction to Measurements” Chemistry 104A Section 47 8-30-06 By: Eddie Autz

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Chem104A Raw Data and Observations: *This information can be found stapled together on the last page. Calculations: Avg. Mass= sum of masses/ # of masses Ex. Avg. mass= 82.011+82.010+82.012+82.011+82.011 = 82.011 5 Standard Deviation= [( I (measured mass I - avg. mass)^2 / (number of values- 1)] Ex. s= { [(82.011-82.011)^2 + (82.010-82.011)^2 + (82.012-82.011)^2 + (82.011-82.011)^2 + (82.011-82.011)^2] / (5-1)} s= 82.0 +/- 7.07E-3 Relative Standard Deviation= standard deviation = 8.906 = .1053 average value 84.605 Results: Exercise 1-A: This is the table that shows the results from massing the same beaker on the same scale. Trials Mass of Beaker(g) Average mass of beaker(g) Standard Deviation 1 82.011 82.011 82.0 +/- 7.07E-3 2 82.010 82.011 82.0 +/- 7.07E-3 3 82.012 82.011 82.0 +/- 7.07E-3 4 82.011 82.011 82.0 +/- 7.07E-3 5 82.011 82.011 82.0 +/- 7.07E-3
Chem104A Exercise 1-B: This table shows the results from massing the same beaker on five different scales. Scale Mass(g) Average Mass(g) Standard Deviation 1 82.011 82.010 82.0 +/- 8.6E-3 2 82.010 82.010 82.0 +/- 8.6E-3 3 82.011 82.010 82.0 +/- 8.6E-3 4 82.009 82.010 82.0 +/- 8.6E-3 5 82.010 82.010 82.0 +/- 8.6E-3 Exercise 1-C: This table shows the results from massing five different beakers on the same scale. Beaker #

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## This note was uploaded on 04/03/2008 for the course CHEM 103a taught by Professor Weso during the Spring '08 term at Arizona.

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intro to measurement - Chem104A Lab Report Chapter...

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