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CHEM 130 EXAM 1 STUDY GUIDE

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Department
Chemistry
Course
CHEM 130
Professor
All Professors
Semester
Fall

Description
Exam1StudyGuide CHAPTER 1  Physicalproperties:A characteristicthatcanbeobservedforamaterialwithoutchanging itschemicalidentity  Soft,silvercolored,meltingpoint(64degrees)  ChemicalProperties:A characteristicofamaterialinvolvingachemicalchange  Reactswithwater,reactswithoxygenetc  Heterogeneousmixture:Mixturethatconsistsofphysicallydistinctparts,eachwith differentproperties  Saltandironfilings,oilandwater  HomogenousMixture:A mixturethatisuniforminproperties,alsocalledasolution  Saltwater,airetc  Significantfigures: digitsinameasurednumber(oraresultofacalculationofmeasured numbers)thatincludeallcertaindigitsplusafinalonehavingsomeuncertainty · MultiplicationandDivision · Keepthesmallestnumberofsignificantfigures · AdditionandSubtraction · Keepthesmallestnumberofdecimalplaces · ExactNumbers · Countednumbers · Definitionsandconversionfactors · Haveaninfinitenumberofsignificantfigures · Rounding · Lookatthefirstdigittotherightofthelastsignificantfigure  ≥5,roundup 
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