chp.1 Intro to measurement

chp.1 Intro to measurement - Chem 104A Lab Report Chapter 6...

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Chem 104A Lab Report Chapter 6 “Introduction to Measurements” Chem 104A Section 045 1/30/07 By: Parker Ashbaugh

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Chem 104A Raw Observations and Date: - This can be found on the sheet stapled to the lab report. Calculations Average Mass= sum of all masses/ total # of masses Ex. Average = 84.2552 + 83.2449 + 83.2540 + 83.2448 + 83.2446 = 83.4487g 5 Standard Deviation = [( I (measured mass I - avg. mass)^2 / (number of values- 1)] Ex. Deviation = { [(84.2452-83.4487)^2 + (83.2449-83.4487)^2 + (83.2540-83.4487)^2 + (83.2448-83.4487)^2 + (83.2446-83.4487)^2] / (5-1)} St. Deviation= 83.4487g +/- .22g Relative Standard Deviation= standard deviation = 3.7977 = .0423 average value 89.7242 Results Exercise 1-A This table 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 84.2452 83.4487 83.4487g +/- .22g 2 83.2449 83.4487 83.4487g +/- .22g 3 83.2540 83.4487 83.4487g +/- .22g 4 83.2448 83.4487 83.4487g
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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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chp.1 Intro to measurement - Chem 104A Lab Report Chapter 6...

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