CHAPTER 2

Measurement

General Information
- Chemical Foundations - Introduction to Scientific Method, Measurement, etc. (CHEM 12, PSU York Campus).
- Unit Conversions and Significant Figures Problem Set AND Unit Conversions Problem Set - Problem sets with answer links (Chemistry 146, Scott E. Van Bramer, Widener University)
- Data Handling-Definitions of general terms: error, significant figures.
- Propagation of Error-Produced at Virginia Tech, this page is still under construction as of 8/22/95.
- Error- Random and systemmatic errors are discussed with examples.
- Accuracy and Precision-Differentiates between the two kinds of expression of uncertainty; includes illustration.
- Fundamental Physical Constants - German & English version
- Fundamental Physical Constants List of physical constants from the National Institute of Standards and Technology Physics Laboratory

Factor-Label Method
- Dimensional Analysis - Explains how this process is used to work problems (Mark's Chemistry Tutor).
- Conversion Factors- Conversion factors by the State of Washington Department of Transportation
Metric System
- The International System of Units - Discusses each of the SI base units plus some derived units (Introductory Chemistry I, Dr. James A. Plambeck, University of Alberta).
- Metric System and Unit Conversion-Table of prefixes; measurement (mass, dimensional, volume, area); practice problems with answers (Ralph Logan).
- Prefixes Used in the SI System - Basic prefixes on number line; sample problems (Univ. of IL).
- Program for Converting Units
- Units - Notation, Prefixes, Basic Units, Derrived Units (Univ. of IL). [Alternate site with same information.]
- SI Units -Lists quantity, name symbol, prefixes, and derrived units.
Exponential Numbers
- What Is Scientific Notation And How Is It Used?-Discussion of exponential numbers and their mathematical manipulation (Ralph Logan).
- Scientific Notation AND Math with Scientific Notation: Addition and Subtraction AND Multiplication and Division - Rules with sample problems plus practice problems with links to answers (ChemTeam, Diamond Bar High School).
- Scientific Notation - A chapter from the MathMol Hypermedia Textbook; basic introduction with links to more advanced lessons: includes practice problems (New York University Scientific Visualization Center).
- Data Powers of Ten- Collection of estimates of amount of data contained in various media; includes links to images.
Significant Digits
- Significant Digits- Rules for determining and using significant figures; questions/practice problems with links to answers (Ralph Logan).
- Rules for Significant Digits-Rules with examples (Gwen Sibert, Roanoke Valley Govenor's School).
- Measuring Underlies Significant Figures AND Significant Figure Rules AND Are Significant Figures Important? A Fable AND Rules for Rounding Off AND Math with Significant Figures: Addition and Subtraction & Multiplication and Division - Discussion of basic concepts with illustrations and examples; includes practice problems with links to solutions (ChemTeam, Diamond Bar High School).
- Significant Figure Rules - Rules with examples (Chem 101, Univ of IL).
- Significant Figures - Rules for determining significant figures and what they mean (Mark's Chemistry Tutor).
- General Rules for Significant Figures-Brief listing of rules with examples (Brian M. Tissue, VA Tech).
- Accuracy and Precision - Definitions with illustration (Brian M. Tissue, VA Tech.)
- Error in Measurement - Discusses accuracy and precision in measurements (Introductory Chemistry I, Dr. James A. Plambeck, University of Alberta).
Density
- Density Calculations - How to calculate density with formula D = M/V plus memory aid; includes a set of practice problems (no answers) (ChemTeam, Diamond Bar High School).
- Density - A chapter from the MathMol Hypermedia Textbook; very basic introduction with graphic and practice problems (New York University Scientific Visualization Center).
- Algebraic Method- Using the algebraic method to solve density and temperature conversion problems; dependent vs. independent variables (Ralph Logan).
- Experimentation, Graphing and Algebraic Derivation-Slope calculations for chemistry; method of determining density (Ralph Logan).
Time, Temperature & Energy
- Temperature - Temperature scales with graphics and conversion problems (Chem 101, Univ of IL).
- Program for Converting Temperatures