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Transcript of Chapter Two Measurements In Chemistry. Copyright © Houghton Mifflin Company. All rights reserved.2...
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Chapter TwoChapter Two
Measurements In Chemistry
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Measurements in Chemistry
→ CO 2.1Measurements can never be exact; there is always some uncertainty.
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← Fig. 2.1 Metric system units are becoming increasingly evident on highway signs.
Measurements in Chemistry cont’d
David Frazier/Photo Researchers
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Table 2.1
Measurements in Chemistry cont’d
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→ Fig. 2.2 Comparisons of the base metric system units of length, mass, and volume with common objects.
Measurements in Chemistry cont’d
E.R. Degginger
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Measurements in Chemistry cont’d
← Fig. 2.3
A cube 10 cm on a side is equal to 1 L; a cube 1 cm on a side is equal to 1 mL.
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Measurements in Chemistry cont’d
→ Fig. 2.4 The use of the concentration unit milligrams per deciliteris common in clinical laboratory reports dealing with the composition of human body fluids.
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← Fig 2.5 The scale on a measuring device determines the magnitude of the uncertainty for the recorded measurement.
Measurements in Chemistry cont’d
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Measurements in Chemistry cont’d
CAG
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→ Fig. 2.6The digital readout on an electronic calculator usually shows more digits than are needed.
Measurements in Chemistry cont’d
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Measurements in Chemistry cont’d
← Fig. 2.7 It is experimentally determined that 1 inch equals 2.54 cm, or 1 cm equals 0.394 inch
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Measurements in Chemistry cont’d
← Table 2.2
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Measurements in Chemistry cont’d
CAG 2.1
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Measurements in Chemistry cont’d
→ Fig. 2.8Both of these items have a mass of 23 grams, but they have very different volumes; therefore, their densities are different as well.
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Measurements in Chemistry cont’d
→ Table 2.3
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Measurements in Chemistry cont’d
← Fig. 2.9
The penny is less dense than the mercury it floats on.
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Measurements in Chemistry cont’d
CC 2.1
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Measurements in Chemistry cont’d
→ Table 2.4
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Measurements in Chemistry cont’d
→ Fig 2.10 The relationships among the Celsius, Kelvin, and Fahrenheit temperature scales are determined by the degree sizes and the reference point values.