'Exact numbers' presentation slideshows

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INTRODUCTION IV. Significant Figures

INTRODUCTION IV. Significant Figures. A. Purpose of Sig Figs. Units of Measurement: Measurements indicate the magnitude of something Must include: A number A unit. A. Purpose of Significant Figures. There are 2 different types of numbers in our world Exact numbers (counting numbers)

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Chem 160- Ch # 2l.

Chem 160- Ch # 2l. Numbers from measurements. Measurements. Experiments are performed. Numerical values or data are obtained from these measurements. Exact Numbers. Exact numbers have an infinite number of significant figures. Exact numbers occur in simple counting operations. 1. 2. 3.

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CHAPTER 1 Matter & Measurement General, Organic, & Biological Chemistry Janice Gorzynski Smith

CHAPTER 1 Matter & Measurement General, Organic, & Biological Chemistry Janice Gorzynski Smith. CHAPTER 1: Matter & Measurement. Learning Objectives: Definition of matter Solids, liquids, and gases Physical vs chemical properties and changes Pure substances: Elements & Compounds

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Chapter 2 Measurements and Calculations

Chapter 2 Measurements and Calculations. Scientific Notation. Technique used to express very large or very small numbers: for example, 2,009,345,234 or 0.00000045723 Expressed as a product of a number between 1 and 10 and a power of 10. Writing Numbers in Scientific Notation.

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Chapter one

Chapter one. Matter and Measurement. Matter. Physical material of the universe; it is anything that has mass and occupies space. Classified by: Physical State Gas Liquid Solid ????? Composition. Composition.

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Measurement

Measurement. Exact Measurements. Where the values are known without any estimation. Examples of Exact Numbers. exactly 17 students in this class exactly 12 eggs in a dozen exactly 1000 g in a kilogram exactly 2.54 cm in an inch

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Chemistry 139

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Chapter 2 Measurements and Calculations

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Chapter 2 Measurements and Calculations

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Units, Measurement, Significant Figures & Conversions

Units, Measurement, Significant Figures & Conversions. Physics. SI Units. The SI Units we will be concerned with mostly are: Quantity Unit Length/Distance Time Mass Temperature . meter [m] second [s] kilogram [kg] Kelvin [K]. SI Units.

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Measurement & Calculations

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Math and Physics

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SIGNIFICANT FIGURES

SIGNIFICANT FIGURES. What are Significant Figures?. The significant figures in a measurement Consist of all the digits known with certainty plus one final digit, which is uncertain or is estimated.

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Selecting a Sample

Selecting a Sample. Janine McElroy Ben Tieniber Chris Herr. Overview . Today we will review the different methods of selecting a sample Sampling in quantitative research and how to use random and nonrandom sampling techniques

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Introduction to General Chemistry

Introduction to General Chemistry. Ch. 1.6 - 1.9. Lecture 2 Suggested HW: 33, 37, 40, 43, 45, 46. Accuracy and Precision.

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Significant Figures

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Community Ecology BDC331

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B. Significant Figures

B. Significant Figures. Significant figures are the meaningful figures in our measurements and they allow us to generate meaningful conclusions Numbers recorded in a measurement are significant. All the certain numbers plus first estimated number e.g. 2.85 cm

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