Chemistry: The Molecular Nature of Matter and Change
Chemistry: The Molecular Nature of Matter and Change
8th Edition
ISBN: 9781259631757
Author: Martin Silberberg Dr., Patricia Amateis Professor
Publisher: McGraw-Hill Education
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Chapter 1, Problem 1.73P

(a)

Interpretation Introduction

Interpretation:

The experiments that yield the same average results are to be identified.

Concept introduction:

Precision is defined as the closeness of two measurements with each other. Accuracy refers to the closeness of the measured values to the standard or known value. Some errors also occur in the calculation of the measured quantities.

The two types of errors are as follows:

1. Systematic error: This error is a part of the experimental setup or faulty devices.

2. Random error: This error occurs always and is due to instruments’ precision.

Random errors can be decreased by taking the average of more measurements. If more measurements are taken, then the average of these values come out to be nearly close to the actual value and therefore the random error is decreased. The calibration of the instrument results in the increased accuracy of the measurements, but not necessarily precision.

(b)

Interpretation Introduction

Interpretation:

The experiment(s) that show high precision is to be identified.

Concept introduction:

Precision is defined as the closeness of two measurements with each other. Accuracy refers to the closeness of the measured values to the standard or known value. Some errors also occur in the calculation of the measured quantities.

The two types of errors are as follows:

1. Systematic error: This error is a part of the experimental setup or faulty devices.

2. Random error: This error occurs always and is due to instruments’ precision.

Random errors can be decreased by taking the average of more measurements. If more measurements are taken, then the average of these values come out to be nearly close to the actual value and therefore the random error is decreased. The calibration of the instrument results in the increased accuracy of the measurements, but not necessarily precision.

(c)

Interpretation Introduction

Interpretation:

The experiment(s) that show high accuracy is to be identified.

Concept introduction:

Precision is defined as the closeness of two measurements with each other. Accuracy refers to the closeness of the measured values to the standard or known value. Some errors also occur in the calculation of the measured quantities.

The two types of errors are as follows:

1. Systematic error: This error is a part of the experimental setup or faulty devices.

2. Random error: This error occurs always and is due to instruments’ precision.

Random errors can be decreased by taking the average of more measurements. If more measurements are taken, then the average of these values come out to be nearly close to the actual value and therefore the random error is decreased. The calibration of the instrument results in the increased accuracy of the measurements, but not necessarily precision.

(d)

Interpretation Introduction

Interpretation:

The experiment(s) that show systematic error is to be determined.

Concept introduction:

Precision is defined as the closeness of two measurements with each other. Accuracy refers to the closeness of the measured values to the standard or known value. Some errors also occur in the calculation of the measured quantities.

The two types of errors are as follows:

1. Systematic error: This error is a part of the experimental setup or faulty devices.

2. Random error: This error occurs always and is due to instruments’ precision.

Random errors can be decreased by taking the average of more measurements. If more measurements are taken, then the average of these values come out to be nearly close to the actual value and therefore the random error is decreased and therefore have high accuracy. The calibration of the instrument results in the increased accuracy of the measurements, but not necessarily precision.

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Chapter 1 Solutions

Chemistry: The Molecular Nature of Matter and Change

Ch. 1.4 - A landowner wants to spray herbicide on a field...Ch. 1.4 - Prob. 1.6BFPCh. 1.4 - Prob. 1.7AFPCh. 1.4 - Prob. 1.7BFPCh. 1.4 - Mercury melts at 234 K, lower than any other pure...Ch. 1.4 - Prob. 1.8BFPCh. 1.5 - For each of the following quantities, underline...Ch. 1.5 - Prob. 1.9BFPCh. 1.5 - Prob. 1.10AFPCh. 1.5 - Prob. 1.10BFPCh. 1 - Prob. 1.1PCh. 1 - Describe solids, liquids, and gases in terms of...Ch. 1 - Use your descriptions from Problem 1.2 to identify...Ch. 1 - Define physical property and chemical property....Ch. 1 - Prob. 1.5PCh. 1 - Which of the following is a chemical change?...Ch. 1 - Which of the following changes can be reversed by...Ch. 1 - Prob. 1.8PCh. 1 - Prob. 1.9PCh. 1 - The alchemical, medical, and technological...Ch. 1 - How did the phlogiston theory explain combustion? Ch. 1 - Prob. 1.12PCh. 1 - Prob. 1.13PCh. 1 - Prob. 1.14PCh. 1 - Prob. 1.15PCh. 1 - Prob. 1.16PCh. 1 - Prob. 1.17PCh. 1 - Prob. 1.18PCh. 1 - Prob. 1.19PCh. 1 - For each of the following cases, state whether the...Ch. 1 - Prob. 1.21PCh. 1 - Prob. 1.22PCh. 1 - Prob. 1.23PCh. 1 - Prob. 1.24PCh. 1 - Prob. 1.25PCh. 1 - Prob. 1.26PCh. 1 - Prob. 1.27PCh. 1 - What is the length in inches (in) of a 100.-m...Ch. 1 - Prob. 1.29PCh. 1 - Prob. 1.30PCh. 1 - Prob. 1.31PCh. 1 - Prob. 1.32PCh. 1 - Prob. 1.33PCh. 1 - Prob. 1.34PCh. 1 - The speed of light in a vacuum is 2.998 × 108 m/s....Ch. 1 - Prob. 1.36PCh. 1 - Prob. 1.37PCh. 1 - Prob. 1.38PCh. 1 - Prob. 1.39PCh. 1 - A small cube of aluminum measures 15.6 mm on a...Ch. 1 - A steel ball-bearing with a circumference of 32.5...Ch. 1 - Prob. 1.42PCh. 1 - Prob. 1.43PCh. 1 - A 25.0-g sample of each of three unknown metals is...Ch. 1 - Prob. 1.45PCh. 1 - Prob. 1.46PCh. 1 - Prob. 1.47PCh. 1 - Prob. 1.48PCh. 1 - Prob. 1.49PCh. 1 - Prob. 1.50PCh. 1 - Prob. 1.51PCh. 1 - Prob. 1.52PCh. 1 - Prob. 1.53PCh. 1 - Prob. 1.54PCh. 1 - Prob. 1.55PCh. 1 - Round off each number in the following calculation...Ch. 1 - Prob. 1.57PCh. 1 - Prob. 1.58PCh. 1 - Prob. 1.59PCh. 1 - Prob. 1.60PCh. 1 - Write the following numbers in scientific...Ch. 1 - Prob. 1.62PCh. 1 - Prob. 1.63PCh. 1 - Prob. 1.64PCh. 1 - Prob. 1.65PCh. 1 - Prob. 1.66PCh. 1 - Prob. 1.67PCh. 1 - Prob. 1.68PCh. 1 - Which of the following include exact numbers? The...Ch. 1 - Prob. 1.70PCh. 1 - Prob. 1.71PCh. 1 - Prob. 1.72PCh. 1 - The following dartboards illustrate the types of...Ch. 1 - Prob. 1.74PCh. 1 - Prob. 1.75PCh. 1 - Bromine is used to prepare the pesticide methyl...Ch. 1 - Prob. 1.77PCh. 1 - Prob. 1.78PCh. 1 - Prob. 1.79PCh. 1 - Prob. 1.80PCh. 1 - Prob. 1.81PCh. 1 - Prob. 1.82PCh. 1 - Prob. 1.83PCh. 1 - Prob. 1.84PCh. 1 - Prob. 1.85PCh. 1 - Prob. 1.86P
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