Significant figures chemistry definition

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      A Short Guide to Significant Figures What is a “significant figure”? The number of significant figures in a result is simply the number of figures that are known with some degree of reliability. The number 13.2 is said to have 3 significant figures. The number 13.20 is said to have 4 significant figures.

    • [PDF File]notes on significant figures - Stanford University

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      Hence a number like 26.38 would have four significant figures and 7.94 would have three. The problem comes with numbers like 0.00980 or 28.09. Rule 2: Any zeros between two significant digits are significant. Suppose you had a number like 406. By the first …

    • [PDF File]Significant Figure Rules - Rice University

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      SIGNIFICANT FIGURES. Example 9: Add the following measured lengths: 945.8 m 9.3 m 136.5 m 800 m 3.3 Multiplication and Division RULE B: THE NUMBER OF SIGNIFICANT FIGURES IN THE RESULT IS THE SAME AS THE NUMBER OF SIGNIFICANT FIGURES IN THE LEAST PRECISE QUANTITY INVOLVED IN THE CALCULATIONS.

    • [PDF File]A Short Guide to Significant Figures - Yale Astronomy

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      Significant figures provide only an approximation of uncertainty, but for ... Use these rules when recording measurements and rounding calculations in chemistry. 1. When Recording a Measurement ... The relationship “1 km = 1000 meters,” is a definition of kilo- and not a measurement with uncertainty. Both the 1 and the 1000 are exact numbers.

    • [PDF File]Significant Figures - Johns Hopkins University

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      Significant Figures CHEM 30A Significant figures convey the precision to which a number is known. They are a part of any numerical answer, and are as important as the number itself and the units. Understanding what significant figures tell us about a number:

    • Significant Figures - Chemistry

      The rules for significant figures can be summarized as follows: 1. To determine the number of significant figures: o All nonzero digits are significant. (1.234 has 4 sig figs) o Zeroes between nonzero digits are significant. (1.02 has 3 sig figs) o Zeroes to the left of the first nonzero digits are not significant. (0.012 has 2

    • [PDF File]Significant Figures Worksheet - drrossymathandscience

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      page 1 of 1 notes_on_significant_figures.doc 9/21/2009 Notes about Significant Figures: The rules for deciding the number of significant figures are: 1. Non-zero digits are significant unless indicated otherwise (for instance see 8. below). 2. Zeros between two non-zero digits are significant. 3. Zeros before the first non-zero digit (i.e. “leading zeros”) are not significant (for instance

    • [PDF File]Significant Figures - Cabrillo College

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      Significant Figures Worksheet Perfect numbers like perfect men are very rare ˜ Rene Descartes I. Determining the Number of Significant Digits Give the correct number of significant digits for each of the following: a. 409.10 b. 305 c. 0.25 d. 0.4020 e. 0.00056030 f. 371 883 g. 308 000 h. 85.00 i. 2.0 X 102 j. 59.98 II. Addition and Subtraction ...

    • [PDF File]Module 3 – Significant Figures

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      Significant Figures The number of significant figures is the number of digits whose values are known with certainty. The numerical values of the experimental results must be written according to specific rules. The number of significant figures that should be used in stating a result is inseparably

    • Significant Figures - Purdue University

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