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Chemistry 121, Week 2 Notes

by: Brigette Honaker

Chemistry 121, Week 2 Notes 121

Marketplace > University of North Dakota > Chemistry > 121 > Chemistry 121 Week 2 Notes
Brigette Honaker

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About this Document

These notes cover the second week of class.
General Chemistry I
Dr. David Pierce
Class Notes
Chemistry, Measurement units, significant figures, unit conversion, dimensional analysis
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This 1 page Class Notes was uploaded by Brigette Honaker on Friday October 14, 2016. The Class Notes belongs to 121 at University of North Dakota taught by Dr. David Pierce in Fall 2016. Since its upload, it has received 4 views. For similar materials see General Chemistry I in Chemistry at University of North Dakota.


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Date Created: 10/14/16
Week T wo Wednesday, September 7, 2016 2:08 PM August 29th, 2016 Experimental Measurements (0.2)  Mass (kg): weight scale  Length (m): ruler  Temperature (K): thermometer o K = C + 273.15 o One K change is the same as one C change  Amount (mol)  Time (s): clock  Volume (m , L) o Derived unit 3 o 1 cm = 1 mL  Density o Density = mass/volume August 31st, 2016 Significant Figures  Addition and Subtraction o Round to the smallest # of decimal places o Keep all sig figs before the decimal  Multiplication and Division o Round to the smallest # of sig figs o Include all #s when rounding, not just those after the decimal. Unit Conversion  Aka dimensional analysis  Key to chemistry calculations  (unit 1)*(unit 2/unit 1)(unit 3/unit 2) = unit 3


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