c) If the accepted value for the density of the bar is 6.70 g/cm³, what is the % relative error? d) Are these measurements more precise or more accurate? Explain. What is the purpose of repetition in measurements?

Principles of Modern Chemistry
8th Edition
ISBN:9781305079113
Author:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Publisher:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
ChapterA: Scientific Notation And Experimental Error
Section: Chapter Questions
Problem 8P
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The following data were obtained in order to determine the density of cylindrical metal bar:
Trial 2
6.45
1.26
46.332
Height (cm)
Diameter (cm)
Mass (g)
Trial 1
6.50
1.25
46.683
In the following calculations on this data, show the formula used, the substituted numbers and the
result.
Calculate the average density of the metal bar.
Trial 3
6.44
1.22
47.014
b) Calculate the percent relative average deviation of the measurements.
c) If the accepted value for the density of the bar is 6.70 g/cm³, what is the % relative error?
d) Are these measurements more precise or more accurate? Explain.
What is the purpose of repetition in measurements?
Transcribed Image Text:The following data were obtained in order to determine the density of cylindrical metal bar: Trial 2 6.45 1.26 46.332 Height (cm) Diameter (cm) Mass (g) Trial 1 6.50 1.25 46.683 In the following calculations on this data, show the formula used, the substituted numbers and the result. Calculate the average density of the metal bar. Trial 3 6.44 1.22 47.014 b) Calculate the percent relative average deviation of the measurements. c) If the accepted value for the density of the bar is 6.70 g/cm³, what is the % relative error? d) Are these measurements more precise or more accurate? Explain. What is the purpose of repetition in measurements?
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