Question

A student takes three measurements of the mass of an object. If the actual mass is $8.54 \mathrm{~g}$, indicate whether each set of measurements is precise but not accurate, accurate but not precise, both accurate and precise, or neither accurate nor precise: (a) $6.38 \mathrm{~g}, 9.23 \mathrm{~g}, 4.36 \mathrm{~g}$ (b) $8.53 \mathrm{~g}, 8.59 \mathrm{~g}, 8.55 \mathrm{~g}$ (c) $9.53 \mathrm{~g}, 8.54 \mathrm{~g}, 7.54 \mathrm{~g}$ (d) $6.25 \mathrm{~g}, 6.27 \mathrm{~g}, 6.26 \mathrm{~g}$

Name: Problem 145, Chapter 2: Introductory Chemistry Atoms First
Uploaded: 2022-02-21T19:13:38-08:00
Duration: 48 s
Channel: Emily Himsel
Description: A student takes three measurements of the mass of an object. If the actual mass is 8.54 g, indicate whether each set of measurements is precise but not accurate, accurate but not precise, both accurate and precise, or neither accurate nor precise: (a) 6.38 g, 9.23 g, 4.36 g (b) 8.53 g, 8.59 g, 8.55 g (c) 9.53 g, 8.54 g, 7.54 g (d) 6.25 g, 6.27 g, 6.26 g

   A student takes three measurements of the mass of an object. If the actual mass is $8.54 \mathrm{~g}$, indicate whether each set of measurements is precise but not accurate, accurate but not precise, both accurate and precise, or neither accurate nor precise:
(a) $6.38 \mathrm{~g}, 9.23 \mathrm{~g}, 4.36 \mathrm{~g}$
(b) $8.53 \mathrm{~g}, 8.59 \mathrm{~g}, 8.55 \mathrm{~g}$
(c) $9.53 \mathrm{~g}, 8.54 \mathrm{~g}, 7.54 \mathrm{~g}$
(d) $6.25 \mathrm{~g}, 6.27 \mathrm{~g}, 6.26 \mathrm{~g}$

Introductory Chemistry Atoms First

Steve Russo; Mike… 5th Edition

Chapter 2, Problem 145

Instant Answer

Solved by Expert Emily Himsel

02/21/2022

Step 1

Accuracy refers to how close a measurement is to the true value. Precision refers to how close the measurements are to each other. Show more…

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A student takes three measurements of the mass of an object. If the actual mass is $8.54 \mathrm{~g}$, indicate whether each set of measurements is precise but not accurate, accurate but not precise, both accurate and precise, or neither accurate nor precise: (a) $6.38 \mathrm{~g}, 9.23 \mathrm{~g}, 4.36 \mathrm{~g}$ (b) $8.53 \mathrm{~g}, 8.59 \mathrm{~g}, 8.55 \mathrm{~g}$ (c) $9.53 \mathrm{~g}, 8.54 \mathrm{~g}, 7.54 \mathrm{~g}$ (d) $6.25 \mathrm{~g}, 6.27 \mathrm{~g}, 6.26 \mathrm{~g}$

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Key Concepts

Accuracy

Accuracy refers to how close a measurement is to the true or accepted value. It indicates the correctness of a measurement, meaning that a highly accurate measurement is near the actual value. This concept highlights systematic errors that might cause measurements to consistently deviate from the true value even if they are similar to one another.

Precision

Precision describes the reproducibility or consistency of measurements regardless of whether they are near the true value. A set of measurements is considered precise if they are closely clustered together, indicating reliability and minimal random error, even if systematic errors make the values inaccurate.

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