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Chemistry: Significant Digits (continued) Significant figures in derived quantities (Calculations) In all calculations, the answer must be governed by the least significant figure employed. ADDITION AND SUBTRACTION: The answer should be rounded off so as to contain the same number
Learning Objectives. Give an example of a measurement whose number of significant digits is clearly too great, and explain why. State the purpose of rounding off, and describe the information that must be known to do it properly. Round off a number to a specified number of significant digits.
This online quiz is intended to give you extra practice in counting significant figures ("sig figs") in decimal and scientific notation as well as simple arithmetic problems. Select your preferences below and click 'Start' to give it a try!
Significant Figure Fable; Measuring Underlies Significant Figures; A Short Guide to Significant Figures [two-page PDF]
Significant Figures: Fundamentals. Use these rules when recording measurements and rounding calculations in chemistry. When Recording a Measurement. Write all the digits you are sure of, plus the first digit that you must estimate in the measurement – the first doubtful digit (the first uncertain digit). Then stop.
State the significant figure rule that is associated with “trailing zeros”. (1) State the significant figure rule that is associated with addition and subtraction operations. (1) State the significant figure rule that is associated with multiplication and division operations.
CHEMISTRY Name: Chapter 1 & 2 Worksheet: Precision, Accuracy, & Significant Figures Accuracy indicates how close a measurement is to the true or accepted value. Precision refers to the reproducibility of a measurement. No measurement of a physical quantity is absolutely certain.
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