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Chapter 1 notes 1.4-1.9

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Chemistry
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Significant Figures
Chemisty AP
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Chem AP Chapter 1 Notes 1.4 ? UNCERTAINTY IN MEASUREMENT Certain digits: numbers that remain regardless of who makes the measurements. Uncertain digits: digits that must be estimated. *Measurements always have a value of uncertainty. *Measurements depend on the precision of the equipment being used. *Always record numbers using sig figs. 25 = between 24 and 16 25.00 = between 24.99 and 25.01 Accuracy: refers to the agreement of a particular value with the true value. Precision: refers to the degree of agreement among several measurements of the same quantity. It reflects the reproducibility of a given type of measurement.
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