'Sig fig practice 2' diaporamas de présentation

Matter and Measurement

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Scientific Measurements Standards for Measurement

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Measurements in Chemistry

Measurements in Chemistry. Measurements and Calculations. Steps in the Scientific Method. 1. Observations - quantitative - qualitative 2. Formulating hypotheses - possible explanation for the observation 3. Performing experiments - gathering new information to decide

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Unit 0: Observation, Measurement and Calculations

Unit 0: Observation, Measurement and Calculations. Cartoon courtesy of NearingZero.net. Steps in the Scientific Method. 1. Observations - quantitative - qualitative 2. Formulating hypotheses - possible explanation for the observation 3. Performing experiments

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Unit 2: Significant Figures, Scientific Notation and Dimensional Analysis

Unit 2: Significant Figures, Scientific Notation and Dimensional Analysis. Cartoon courtesy of NearingZero.net. Nature of Measurement. Measurement - quantitative (based on numbers) -made up of 2 parts. - number - unit You must ALWAYS include the unit!!!

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Measurements and Calculations

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Uncertainty and Significant Figures

Uncertainty and Significant Figures. Cartoon courtesy of Lab-initio.com. Uncertainty in Measurement. A digit that must be estimated is called uncertain . A measurement always has some degree of uncertainty. Why Is there Uncertainty?. Measurements are performed with instruments

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Chemical Foundations

Chemical Foundations. Steps in the Scientific Method. 1. Observations - quantitative - qualitative 2. Formulating hypotheses - possible explanation for the observation 3. Performing experiments - gathering new information to decide whether the hypothesis is valid.

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Chemical Foundations

Chemical Foundations. Steps in the Scientific Method. 1. Observations - quantitative - qualitative 2. Formulating hypotheses - possible explanation for the observation 3. Performing experiments - gathering new information to decide whether the hypothesis is valid.

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Chemical Foundations

Chemical Foundations. Steps in a Scientific Method (depends on particular problem). 1. Observations - quantitative - qualitative 2. Formulating hypotheses - possible explanation for the observation 3. Performing experiments - gathering new information to decide

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Chemistry Chapter 2

Chemistry Chapter 2. Measurements and Calculations. Steps in the Scientific Method. 1. Observations - quantitative - qualitative 2. Formulating hypotheses - possible explanation for the observation 3. Performing experiments - gathering new information to decide

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Measurement and Significant Figures

Measurement and Significant Figures. www.lab-initio.com. Steps in the Scientific Method. 1. Observations - quantitative - qualitative 2. Formulating hypotheses - possible explanation for the observation 3. Performing experiments - gathering new information to decide

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Measurements and Calculations

Measurements and Calculations. Rules for Counting Significant Figures - Details. Nonzero integers always count as significant figures. 3456 has 4 sig figs. Rules for Counting Significant Figures - Details. Zeros - Leading zeros do not count as significant figures . 0.0486 has

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Measurement and Significant Figures

Measurement and Significant Figures. www.lab-initio.com. Steps in the Scientific Method. 1. Observations - quantitative - qualitative 2. Formulating hypotheses - possible explanation for the observation 3. Performing experiments - gathering new information to decide

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Review: Measurement and Calculations in Significant Figures

Review: Measurement and Calculations in Significant Figures. Cartoon courtesy of NearingZero.net. Rules for Counting Significant Figures. Nonzero integers always count as significant figures. 3456 has 4 sig figs. Rules for Counting Significant Figures. Zeros

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Measurements and Calculations

Measurements and Calculations. Numbers. Numbers in science are different than in math. Numbers in science always refer to something. 3.487 grams 12 eggs in the carton 12 inches to a foot 5.64 grams/ cm 3 It is important to remember where numbers come from. Sources of Numbers.

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Unit 0: Observation, Measurement and Calculations

Unit 0: Observation, Measurement and Calculations. Cartoon courtesy of NearingZero.net. Precision and Accuracy. Accuracy refers to the agreement of a particular value with the true value. Precision refers to the degree of agreement among several measurements made in the same manner.

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Significant Figures

Significant Figures. Purpose . Significant figures are used with any measurement They tell you something about the accuracy of the tool used Sig figs are the known or certain digits in a measurement plus the estimated digit. example.

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Uncertainty and Significant Figures

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Significant Figures

Significant Figures. Cartoon courtesy of Lab-initio.com. Adapted from http://www.sciencegeek.net/Chemistry/Powerpoints2.shtml. Rules for Counting Significant Figures - Details. Zeros - Leading zeros do not count as significant figures . 0.0486 has 3 significant figures.

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