CHEM W1500 Lecture Notes - Lecture 1: Significant Figures, Graduated Cylinder, Lithium Hydroxide
18 Dec 2020
School
Department
Course
Professor
Document Summary
Significant figures & decimal places ( 4 sig figs ) ( 2 sfs ) significant ( o . 14. 575 (cid:15482) 14. 58 rain up ( rule of five ) Multiplication / division maintain smaller sig figs for. 14. 42 ) ( 2. 568 ) = 1. 721183801 (cid:15482) 1. 72 order of operations matters ! ( 2. Given data : option : round l not round when multiple steps involved ( case by case but don"t round generally ) Mass of empty beaker = 5. 810 i 0. 001g: volume of alcohol added = 5. 00 i 0. 01 ml. What is the mass of the alcohol ? ( mass of beaker & alcohol ) - ( mass of beaker ) = mass of alcohol. I 0. 002g add absolute errors with t and : what is the density of the alcohol ? ( mass of alcohol ill volume of alcohol ) 3. 945=10. 00292 = 0. 789 glml: 00 i 0. 01ml leave as 3 sig figs given the volume measurement.
