How to do significant figures in chemistry
[PDF File]Absolute Uncertainty – Relative Uncertainty
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Uncertainties and Significant Figures Absolute Uncertainty – the absolute uncertainty is the number which, when combined with a reported value, gives the range of true values. For instance, a length may be reported as 7.3 mm ± 0.2 mm.
[PDF File]HOW TO DO IT SIGNIFICANT FIGURES - Bates College
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HOW TO DO IT SIGNIFICANT FIGURES When scientists write down a measured or calculated value, they always understand that the value they write has an implied precision, as follows: 15. means ± .5 (closer to 15. than to 16. or to 14. ) 15.0 means ± .05 (closer to 15.0 than to 15.1 or to 14.9 )
[PDF File]Significant Figures
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significant figures, and they do not affect the significant figures of the final answer when they are used in a calculation. Often in conversion factors, one number is fixed as being exact, while the other is measured relative to this exact number. For example,
[PDF File]CHM 130 Sig Fig Practice Problems
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Significant digits or figures are not something we make up to terrorize you all semester long. They represent the accuracy of a measurement. For example, a cheap bathroom scale bought at the dollar store reads your weight as 152 pounds, not 152.45809 pounds. It is not that accurate. Significant digits are very important in all measurements.
[PDF File]Significant Figures - Washburn University
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Significant Figures Shaun E. Schmidt, Ph. D. last revised 9/13/2007 Significant digits or figures are those digits in a measured number (or result of a calculation with measured numbers) that include all certain digits plus a final one having some uncertainty.
[PDF File]Rules for Significant Figures (sig figs, s.f.)
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Rules for Significant Figures (sig figs, s.f.) A. Read from the left and start counting sig figs when you encounter the first non-zero digit 1. All non zero numbers are significant (meaning they count as sig figs) 613 has three sig figs 123456 has six sig figs 2. Zeros located between non …
[PDF File]SIGNIFICANT FIGURES, EXPONENTS, AND SCIENTIFIC …
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2. Zero digits that occur between nonzero digits are significant. 202 contains three significant figures ⎫ In these examples, the zeros 450.5 contains four significant figures ⎬ are part of a measurement. 390.002 contains six significant figures ⎭ 3. Zeros at the beginning of a number (i.e., on the left-hand side) are considered to be placeholders and
[PDF File]Significant Figures
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Significant Figures The Significant Figures of a number refer to those digits that have meaning in reference to a measured or specified value. Correctly accounting for Significant Figures is important while performing arithmetic so that the resulting answers accurately represent numbers that have computational significance or value.
[PDF File]Significant Figure Rules
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Are Significant Figures Important? A Fable A student once needed a cube of metal that had to have a mass of 83 grams. He knew the density of this metal was 8.67 g/mL, which told him the cube's volume. Believing significant figures were invented just to make life difficult for chemistry students and had no practical use in the
[PDF File]Significant Figures in Calculations Rules
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Significant Figures with Mixed Operations When doing a calculation that involves only multiplication and/or division, you can do the entire calculation then round the answer to the correct number of significant figures at the end.
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