Chem 115 1nd EditionExam # 1 Study Guide Lectures: 1 - 6Lecture 2 (January 10)What is the difference between physical and chemical properties?Physical properties are properties that a substance shows without another substanceChemical properties are properties that a substance shows when interacting with another substanceWhat kind of property is a change of state?PhysicalWhich change is reversible? Irreversible? Physical is reversible, chemical is notWhat is the difference between potential and kinetic energy?Potential is based on position of an object while kinetic is based on the motion of an objectWhich energy state is more stable?Lower energyBe able to do conversionsLecture 3 (January 13)What are the rules for adding/subtracting sig-figs?The same amount of sig-figs are in the answer are the same as the fewest decimal placesWhat are the rules for multiplying/dividing sig-figs?Uses the least number of sig-figsConvert 645 K into OC and OF645 K - 273.15 K = 371.85 O C(371.85 OC) 9/5 = 669.33 + 32 = 701.33 O FLecture 4 (January 15)What is the difference in the Law of Definite Composition and the Law of Multiple Properties?Law of Definite Composition is a compound is composed of the same elements and same partsLaw of Multiple Properties are whole number compound ratiosWhat are the 4 components to Dalton’s Atomic Theory?1. All matter consists of atoms2. Atoms of one element can’t be converted into atoms of another element3. Atoms of an element are identical in mass, other properties, and are different from the atoms of any other element4. Compounds result from the chemical composition of a specific ratio of atoms of differentelementsWhat did Milikan’s oil drop experiment determine?Be able to measure electron chargeMass of Electron = Mass/Charge X ChargeWhat did Rutherford’s scattering experiment determine?Discovered atomic nucleusWhat is the mass number equal to?Protons + NeutronsWhat is the atomic number equal to?ProtonsLecture 5 (January 17)What kind of things make up an ionic bond? Covalent?Ionic bond – Metal and Non-MetalCovalent – Non-Metal and Non-MetalWhat has an overall electrical charge?IonsWhat is the difference between the chemical formula and empirical formula?Chemical formula indicates the type and number of an atomEmpirical formula is the simplest ratio for a chemical formulaBe able to name compoundsLecture 6 (January 22)-ate turns into -ic-ite turns into -ousWhat is the molecular mass measuring?Sum of atomic massesWhat is the formula mass?Molecular mass for ionic compoundsWhat is the difference between heterogeneous and homogenous mixtures?Heterogeneous has visible boundaries between components while homogeneous doesn’tWhat is Avogadro’s number?6.022 X 1023What is the formula for M (molar
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