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CH 101 - Week 1 Review of Significant Figures

by: Alexis Elston

CH 101 - Week 1 Review of Significant Figures CH 101

Marketplace > University of Alabama - Tuscaloosa > Science > CH 101 > CH 101 Week 1 Review of Significant Figures
Alexis Elston
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About this Document

Complete Breakdown of Addition, Subtraction, Multiplication, and Division of Significant Figures as well as how to count significant figures and what exact numbers translate out to be.
General Chemistry 1
Dr. Bakker
Class Notes
significant figures, Chemistry, General Chemistry, Math, week 1




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This 2 page Class Notes was uploaded by Alexis Elston on Wednesday August 31, 2016. The Class Notes belongs to CH 101 at University of Alabama - Tuscaloosa taught by Dr. Bakker in Fall 2016. Since its upload, it has received 13 views. For similar materials see General Chemistry 1 in Science at University of Alabama - Tuscaloosa.

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Date Created: 08/31/16
Review of Significant Figures:  Any digit that is not zero is significant o 1.234 = 4 significant figures  Any zeros between nonzero digits is significant o 606 = 3 significant figures  Any zeros to the left of the first nonzero digit are NOT significant o 0.08 = 1 significant figure  If a number is greater than 1, then all digits to the left of the decimal are significant o 2.0 = 2 significant figures  If a number is less than 1, then all digits at the end and in between are significant o 0.004020 = 4 significant figures Addition and Subtraction of Significant Figures:  Round to the lowest number of significant figures used in problem after the decimal point. o 89.332 + 1.1 = 90.432  Round to 1 significant figure after decimal because of 1.1  90.4 is the correct answer o 3.70 – 2.9133 = .7867  Round to 2 significant figures after the decimal because of 3.70  .79 is the correct answer Multiplication and Division:  Round to the lowest number of significant figures used in the original problem regardless of a decimal point o 4.51 x 3.6666 = 16.536366  Round to 3 significant figures because of 4.51  16.5 is the correct answer Exact Numbers:  Numbers from definitions or objects are considered to have infinite significant figures and should be excluded from rounding purposes o Take the average of 6.64, 6.68, and 6.70 6.64+6.68+6.70  3 = 6.67333  Round to 3 significant figures because 3 is not included (definition of average is how we determined that we would divide by 3) o 6.67 is the correct answer NOTE:  No measurement can be more accurate than half the smallest division of the measuring tool


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