4. In three separate trials, you determine the density of an unknown object to be: Trial 1: 11.579 g/mL Trial 2: 9.548 g/mL Trial 3: 13.213 g/mL a. What is the average density? (don't round yet!) b. What would be the standard deviation? (Don't round yet!) c. Round the standard Deviation to 2 sig figs. Round the average, x, to the same decimal point as the standard deviation sx Report as x ± Sx. d. Calculate the Relative Standard Deviation (RSD) of the measurements. When calculating the RSD, use non-rounded values for sx and x (you don't want to introduce successive rounding errors). Round the RSD to two significant digits.
4. In three separate trials, you determine the density of an unknown object to be: Trial 1: 11.579 g/mL Trial 2: 9.548 g/mL Trial 3: 13.213 g/mL a. What is the average density? (don't round yet!) b. What would be the standard deviation? (Don't round yet!) c. Round the standard Deviation to 2 sig figs. Round the average, x, to the same decimal point as the standard deviation sx Report as x ± Sx. d. Calculate the Relative Standard Deviation (RSD) of the measurements. When calculating the RSD, use non-rounded values for sx and x (you don't want to introduce successive rounding errors). Round the RSD to two significant digits.
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Question 4
Transcribed Image Text:1- Accurate Measurement and Density
4.
In three separate trials, you determine the density of an unknown object to be:
Trial 1: 11.579 g/mL Trial 2: 9.548 g/mL
a. What is the average density? (don't round yet!)
Trial 3: 13.213 g/mL
b. What would be the standard deviation? (Don't round yet!)
c. Round the standard Deviation to 2 sig figs. Round the average, x, to the same decimal
point as the standard deviation Sx Report as x ± Sx.
d. Calculate the Relative Standard Deviation (RSD) of the measurements. When calculating
the RSD, use non-rounded values for sx and x (you don't want to introduce successive
rounding errors). Round the RSD to two significant digits.
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