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## CH 101 - Week 1 Review of Significant Figures

by: Alexis Elston

13

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# 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
UA
GPA 4.0

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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.
COURSE
General Chemistry 1
PROF.
Dr. Bakker
TYPE
Class Notes
PAGES
2
WORDS
CONCEPTS
significant figures, Chemistry, General Chemistry, Math, week 1
KARMA
Free

## Popular in Science

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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