Chapter Two CHE 111
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This 3 page Class Notes was uploaded by Jlyon on Saturday September 19, 2015. The Class Notes belongs to CHE 111 at State University of New York at Oswego taught by Jeffery A. Schneider (P) in Fall 2015. Since its upload, it has received 42 views. For similar materials see General Chemistry in Chemistry at State University of New York at Oswego.
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Date Created: 09/19/15
General Chemistry Chapter 2 Notes Significant Figures Ex 1121 four sig figs All non zeros are significant 305 three sig figs All captive zeros are significant 00021 two sig figs Leading zeros are not significant 0000305 three sig figs Look back to the prior two rules 1200 12e3 This is ambiguous fix it by writing it in exponential form AddingSubtracting Sig Figg Ex 10250 0231 102731 Change to only 2 past the decimal due to the top number 10273 5 sig figs 3 sig figs 5 sig figs MultiplyingDividing Ex 14 8011 112154 Product can only have smallest sig figs 11 Changed to two sig figs 1157 30588 003782529 Change to least of sig figs 003783 4 sig figs Exact Numbers 1 100 cents Baker s Dozen 1in 254cm Exact numbers never determine sig figs in your answer Accuracy vs Precision Accuracy is being closest to the actual point True value Precision is being closest to many points The point that are all close together Temperature Kelvin Celsius 27315 Fahrenheit 95 Celsius 32 Celsius 5 Fahrenheit 32 9 Conversions EX How many cm are in 12in 16 Z 12in 3048cm multiply across the top 5 Ex How many inches are in 157cm 1e 3 157cm 23934 cm 618in divide by number on the bottom EX How many k quot 2 are in 40144896e9 inz lEZ 254Z cm 1m 2 1km 2 2 4014489669 loocm 100071 258998811Km 6 a 2 1116
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