Which of the following represents the precision of a set of measurements? A student used water displacement method to measure the density of a metal. The average result of five attempts was 2.763 g/mL, and the calculated standard deviation was 0.026 g/mL. How should the result be reported in a "mean +/- st. dev." format? The molar mass of butane (C4H10) is 58 g/mol. If a student measured the molar mass of butane to be 63, what is the % error of the measurement? Use no decimal place when entering the answer. Several balloons of He gas are kept at the same temperature, but different pressure. At which pressure does the gas have the lowest density?
Which of the following represents the precision of a set of measurements? A student used water displacement method to measure the density of a metal. The average result of five attempts was 2.763 g/mL, and the calculated standard deviation was 0.026 g/mL. How should the result be reported in a "mean +/- st. dev." format? The molar mass of butane (C4H10) is 58 g/mol. If a student measured the molar mass of butane to be 63, what is the % error of the measurement? Use no decimal place when entering the answer. Several balloons of He gas are kept at the same temperature, but different pressure. At which pressure does the gas have the lowest density?
Chemistry & Chemical Reactivity
9th Edition
ISBN:9781133949640
Author:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Publisher:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
ChapterL: Let's Review
SectionL.2: Making Measurements: Precision, Accuracy, Experimental Error, And Standard Deviation
Problem 1RC
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Which of the following represents the precision of a set of measurements?
A student used water displacement method to measure the density of a metal. The average result of five attempts was 2.763 g/mL, and the calculated standard deviation was 0.026 g/mL. How should the result be reported in a "mean +/- st. dev." format?
The molar mass of butane (C4H10) is 58 g/mol. If a student measured the molar mass of butane to be 63, what is the % error of the measurement? Use no decimal place when entering the answer.
Several balloons of He gas are kept at the same temperature, but different pressure. At which pressure does the gas have the lowest density?
Expert Solution
Step 1
Given:
mean = 2.763 g/mL
standard deviation = 0.026 g/mL
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