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Ch.1 - Matter, Measurement & Problem Solving
Tro - Chemistry: A Molecular Approach 6th Edition
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Tutti i libri di testoTro 6th EditionCh.1 - Matter, Measurement & Problem SolvingProblema 82d
Capitolo 1, Problema 82d

How many significant figures are in each number? d. 4,100 km

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Identify the given number: 4,100 km.
Determine if there is a decimal point present. In this case, there is no decimal point.
Recognize that without a decimal point, trailing zeros are not considered significant.
Count the significant figures: The digits '4' and '1' are significant.
Conclude that the number 4,100 km has 2 significant figures.

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Significant Figures

Significant figures are the digits in a number that contribute to its precision. This includes all non-zero digits, any zeros between significant digits, and trailing zeros in the decimal portion. Understanding significant figures is crucial for accurately reporting measurements and calculations in scientific contexts.
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Significant Figures Example

Trailing Zeros

Trailing zeros are the zeros at the end of a number. Their significance depends on the presence of a decimal point. For example, in the number 4,100, the trailing zeros are ambiguous without additional context, as they may or may not indicate precision. Clarifying whether a decimal point is present helps determine if these zeros are significant.
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Zero-Order Reactions

Contextual Clarity

Contextual clarity refers to the importance of understanding the context in which a number is presented to determine its significant figures. In scientific notation or when a decimal point is included, the significance of trailing zeros can be clearly defined. This understanding is essential for interpreting measurements accurately in chemistry.
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Bohr Model of the Atom
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