CHE 101 Lecture Outline Chapter 1 Information NOT in Syllabus Please read entire syllabus located on UB Learns Getting Help Go to Instructor office hrs Start 8 29 First 2 weeks of classes ALL my office hrs are in NSC325 Mon Wed 11 30am 1 00pm in NSC110 Tue Thur 9 30am 11 00am in NSC325 Go to TA s in NSC110 for help Starts 9 11 1st come 1st serve basis Please bring notes Lecture UB Learns Gulde Folder Reading schedule indicates sections that are are not covered from text Announcements made at start of lecture Skeleton Outlines to help take notes if you wish Answers to Additional Problems extra problems are located at end of each outline Pre Recorded Lecture Videos Videos you will need to watch to help you fill in your lecture notes for material not covered during lecture Videos to Help you Study YouTube videos I have found pertaining to the more difficult material Recorded Lectures All lectures are recorded can be found under the Classroom Recording link on UB Learns listed by date time Please bring to EVERY class Outlines UB Learns Calculator Periodic table UB Learns 1 CHE 101 Lecture Outline Chapter 1 Mastering chemistry Due 11 59AM Issues Technical Contact Mastering Chemistry Pop up Blocker disabled OR Flash player updated Grade postings Contact Dr Frerichs Answering questions Contact Dr Gulde or Dr Frerichs Registering View Video on UB Learns then contact Dr Frerichs Optional Assignments no credit Both HIGHLY RECOMMENDED Intro to Mastering Chemistry Chemistry Primer Hints Some questions have them able to earn extra pts if answered correctly If answer incorrectly can lose points but if they help you answer the overall question then you usually earn more points than you would lose if you didn t answer the question No points lost if look at them HIGHLY recommend using when available You get 6 attempts at each question Suggestions Each assignment 2 4 hrs Work the problems pertaining to material learned in that day s lecture If can t answer in 10 minutes move on and seek help 2 CHE 101 Lecture Outline Chapter 1 Chapter 1 Matter Measurement What is chemistry Chemistry measuring and analyzing matter and how it changes Also interested in the energy associated with these change Matter has mass and takes up space Atom smallest building block of matter Molecules 2 or more atoms bonded together MATERIAL TO LEARN ON YOUR OWN Chapter 1 contains many definitions that describe matter I do not have time to cover them in lecture A Pre recorded lecture is located on UB Learns for you to watch and fill in your notes Prior to your next lecture Video Location Gulde Folder PreRecorded Folder Chapter01 Matter and Math Turn to PAGE 10 Measurements to continue with your in class lecture 3 CHE 101 Lecture Outline Chapter 1 States of Matter Defined by how a container is filled 1 Gas fixed shape fixed volume conform to container fills it Atoms molecules 2 Liquid fixed shape but fixed volume conform to a container fills it Atoms molecules 3 Solid fixed shape fixed volume conform to a container fills it Atoms molecules packed Pure Substances Pure Substances have properties a composition 1 Elements decompose into anything smaller Listed on known are natural Represented by letters 2nd letter ALWAYS Carbon Oxygen Cobalt CO carbon monoxide A Most Elements made up of type of individual Each ball atom is from the others Gold Copper 4 CHE 101 Lecture Outline Chapter 1 FEW Elements exist as Diatomic molecules of the atom are Only exist all are Natural state how exist in nature Naming O2 or H2 or Other elemental molecules Ozone 2 Compounds molecules of 2 or more elements that are Combined in a ratio Water vs Peroxide decompose into respective 5 CHE 101 Lecture Outline Chapter 1 Mixtures Mixture combination of 2 or more Mixtures are a pure substance but pure substances Each substance their original properties Can each substance composition Types of mixtures a Homogeneous mixtures appearance composition Ex Air sugar water Aka b Heterogeneous mixtures composition appearance Ex Rocks sand Properties of Matter 1 Physical properties describes by itself Observed identify composition 2 Chemical properties describes with OTHER substances How a substance to form a new substance 6 CHE 101 Lecture Outline Chapter 1 Intensive property depend on how much of sample is present Extensive property depend on how much of sample is present Changing Matter 1 Physical Changes alters not substance before and after Ex Change in 2 Chemical Changes AKA chemical reactions starting substance to substance s substance before and after Usually associated w 7 CHE 101 Lecture Outline Chapter 1 Accuracy vs Precision Accuracy how close many measurements are to a value Based on the average of all the measurements Precision how close many measurements are to other Based on the standard deviation of all the measurements The used in a measurement reflects the of the equipment The more digits recorded the more the equipment Always able to the last digit 8 CHE 101 Lecture Outline Chapter 1 SCIENTIFIC NOTATION Sci Not Need a way to write big small numbers clearly Distance to Andromeda Galaxy miles 14930000000000000000 Radius of a Carbon atom meters 0 00000000007 SCIENTIFIC NOTATION Sci Not s in a special format by moving the decimal point Appendix A1 pg 1080 a bcd n of times the is moved If original is large exponent is If original is small exponent is Calculator has a built in button E EE EXP or x10n 7x10 11 9 CHE 101 Lecture Outline Chapter 1 Measurements Every measurement in science is described with a number and a unit 12 in 1 ft Relationship Numbers in Measurements 2 types of numbers exist in science 1 Exact s values are known exactly Determined by Counting 5 pens Definition 1 dozen 12 2 Inexact s contain uncertainty Result of equipment or human error in a measurement A guess is usually involved How long is the plank of wood Possible answers 64 Last digit guessed uncertain Would 65 5 be an acceptable guess NO Can only guess 1 digit at a time 10 CHE 101 Lecture Outline Chapter 1 Significant Figures Sig Figs Significant figures Sig Figs determines what numbers are important Contains all the known digits in a measurement AS WELL AS the guessed digit Assume any number given to you is from a measurement unless otherwise indicated General rule work left to right once hit a number 1 9 start counting all digits 9604 4 sigs Watch out for zeroes 1 Ending zeros with a decimal point are significant 0 0930 3 sigs 200 3 sigs 2 940x10 5 4 sigs 2 Ending zeros without