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CHE 105, Week 1

by: Mecca Gordon

CHE 105, Week 1 CHE 105

Mecca Gordon

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first chapter notes
General College Chemistry I
Dr. Beeram
Class Notes
matter, mass
25 ?




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This 6 page Class Notes was uploaded by Mecca Gordon on Thursday September 1, 2016. The Class Notes belongs to CHE 105 at University of Kentucky taught by Dr. Beeram in Fall 2016. Since its upload, it has received 29 views. For similar materials see General College Chemistry I in Chemistry at University of Kentucky.


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Date Created: 09/01/16
Friday, August 26, 2016 Chapter 1: Matter, Measurement, and Problem-solving Comp. of Matter - Atoms - Molecules • bonds of different strength Structure and Properties Goal: To Understand substance must understand atom and molecules Carbon monoxide Carbon Dioxide 1. one carbon and one oxygen “ 2. colorless and oderless “ 3. burns blue Incombustible 4. binds to hemoglobin Will not bind to hemoglobin Element: substance that can NOT be separated into simpler substances EX: Hg, C, F, N Matter: Anything that takes up space and has mass Substance: 3 Types of matter Solid - closely packet particles - Fixed volume - can not be compressed - Can not flow 1 Friday, August 26, 2016 - has rigid shape 2 types * Crystalline * Amorphous Liquid - Closely packet but can still move - Has a fixed volume - Assume Container - Can not be compressed - Can flow Gas - Lots of space between particles - Free moving - No fixed volume - can be compressed - can flow Measuring - Mass - 1 kg=1000g=1*10^3g - Weight - C * Mass Pure vs Mixure - element v compound - heterogeneous-wet sand vs homogeneous - tea w/ sugar compound composed of atom at 2 or more elements - can separated 2 Friday, August 26, 2016 mixture 2 or more substances -homogeneous mixture-milk Physical vs Chemical change Physical - change will not alter composition ex ice melting Oder, taste, color, apperace, melting point, boiling point Chemical - alters the compositions identity - only a chemical reaction International Unit 3 Friday, August 26, 2016 Length Mass - SI unit = Meters(m) - SI unit= Kilogram (kg) - 1m=100cm - mass is always the same - 1in=.01m=10mm - 1kg=2.2046lb, 1lb = 453.59g - 1in=2.54cm Weight:Force that gravity excess on objets EX: 130 lbs on earth = 20 lbs on the moon Temperature : measure of average kinetic energy caused by the motion - measured in Kelvin - heat flows from hot object to cold object EX: ice in hands -F=9/5* C + 32. K = C+273.15, C= (F-32)/1.8 4 Friday, August 26, 2016 Volume: measures of amount of space occupied - SI units Cubic Meters(m^3) - commonly used in solids in m^3 Density: ratio mass to volume(intensive property) - Extensive: properties whose values depends on quantity of matter - EX: mass, length, volume, temp - Intensive: properties whose value is independent of the quantity of matter - EX: mp,bpd Mass and Volume relationship 5 Friday, August 26, 2016 Measurement and Sig Figs -Unit tells standard in object comparison - Sci notation EX: 602,200,000,000,000,000,000 = 6.022*10^23 .00000772 = 7.72*10^ -6 Adding and Subtracting 1. Write each quantity with the same exponent n. 2. Combine N a1d N 2 3. The exponent, n, remains the same. Multiplication 1. Multiply N1and N 2 . 2. Add exponents n and n 1 2 Dividing 1. Divide N and N . 1 2 2. Subtract exponents n a1d n 2 6


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