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Chemistry Praxis Study Questions and Answers
  • Examen

    Chemistry Praxis Study Questions and Answers

  • Intensive property A physical property of a substance that is not dependent on the size of mass of a sample, and cannot be determined by looking at the substance. Ex: density, mp, bp, temperature. Extensive property A physical property that depends on the amount of matter in a sample. Ex: mass, volume. Chemical property How a substance will change when it reacts with other substances and changes its chemical identity. Ex: flammability, oxidation state, toxicity. Periodic table -Arranged by in...
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Chemistry Praxis Review Questions and Answers
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    Chemistry Praxis Review Questions and Answers

  • Schrodinger (1925) Continued upon Bohr's findings to determine where electrons are typically found. Heisenberg (1927) Created the heisenberg uncertainty principle because you never can predict where the electron is. (Breaking Bad) De Broglie (1924) Electrons act like waves around the atom. Niels Bohr (Bohrbit) (1913) Electrons can orbit the nucleus in certain special orbits at different energy levels around the nucleus. Earnest Rutherford (foil) (1910) Fired beam of alpha particles at thin ...
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Chemistry Content Knowledge 5245 Practice Questions and Answers
  • Examen

    Chemistry Content Knowledge 5245 Practice Questions and Answers

  • Homogeneous Mixture distributed uniformly throughout mixture; Air; Solutions Heterogeneous Mixture not distributed uniformly throughout mixture; sand & salt; Suspensions Solute substance that is being dissolved; sugar Solvent substance doing the dissolving; water Physical Properties can be seen or observed; mass, volume, density, color, boing/freezing points, hardness, conductivity Chemical Properties cannot be measured without changing identity or composition of matter; flammability, corro...
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Chemistry Content Knowledge 5245 (Reactions/Structures) Review Questions and Answers
  • Examen

    Chemistry Content Knowledge 5245 (Reactions/Structures) Review Questions and Answers

  • Polarimetry, Spectroscopy, Pressure Measurement Three ways to measure a change in concentration Gas chromatography, mass spectrometry, titration Methods used to measure slow reactions with aliquots Zero Order Reaction rate of the reaction is independent of the concentration of the reactant Rate = k[A]⁰ = k First Order Reaction rate of the reaction is directly proportional to the concentration of the reactant Rate = k[A]¹ Unimolecular: A → products Second Order Reaction rate of the react...
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Chemistry (5245) Praxis Practice Questions and Answers
  • Examen

    Chemistry (5245) Praxis Practice Questions and Answers

  • phase change The term phase transition is most commonly used to describe transitions between solid, liquid and gaseous states of matter, and, in rare cases, plasma Gas gas is one of the four fundamental states of matter Energy transformation energy transformation or energy conversion is the process of changing one form of energy to another form of energy Physical properties A physical property is any property that is measurable, whose value describes a state of a physical system Element In m...
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Chemistry Content Knowledge 5245 (Reactions/Structures) Review Questions and Answers
  • Examen

    Chemistry Content Knowledge 5245 (Reactions/Structures) Review Questions and Answers

  • Polarimetry, Spectroscopy, Pressure Measurement Three ways to measure a change in concentration Gas chromatography, mass spectrometry, titration Methods used to measure slow reactions with aliquots Zero Order Reaction rate of the reaction is independent of the concentration of the reactant Rate = k[A]⁰ = k First Order Reaction rate of the reaction is directly proportional to the concentration of the reactant Rate = k[A]¹ Unimolecular: A → products Second Order Reaction rate o...
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Praxis Chemistry 5245 Study Questions and Answers
  • Examen

    Praxis Chemistry 5245 Study Questions and Answers

  • First Law of Thermodynamics Law of Conservation of Energy Law of Conservation of Mass Total Mass of Products = Total Mass of Reactants Kinetic Energy KE = 1/2 mv² Heat Flow of Thermal Energy Conduction Heat transferred directly Convention Heat transferred through currents Radiation Heat transferred through electromagnetic waves Specific Heat The amount of heat requires to raise the temperature of a unit of mass by 1°. C = Q/m delta T Sublimation Point The portion of the...
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Chemistry (5245) Praxis Practice Questions and Answers
  • Examen

    Chemistry (5245) Praxis Practice Questions and Answers

  • phase change The term phase transition is most commonly used to describe transitions between solid, liquid and gaseous states of matter, and, in rare cases, plasma Gas gas is one of the four fundamental states of matter Energy transformation energy transformation or energy conversion is the process of changing one form of energy to another form of energy Physical properties A physical property is any property that is measurable, whose value describes a state of a physical system Elem...
  • twishfrancis
    $9.49 Más información
Chemistry Praxis Study Questions and Answers
  • Examen

    Chemistry Praxis Study Questions and Answers

  • Intensive property A physical property of a substance that is not dependent on the size of mass of a sample, and cannot be determined by looking at the substance. Ex: density, mp, bp, temperature. Extensive property A physical property that depends on the amount of matter in a sample. Ex: mass, volume. Chemical property How a substance will change when it reacts with other substances and changes its chemical identity. Ex: flammability, oxidation state, toxicity. Periodic table -Arranged...
  • twishfrancis
    $10.99 Más información
Chemistry Content Knowledge 5245 Practice Questions and Answers
  • Examen

    Chemistry Content Knowledge 5245 Practice Questions and Answers

  • Homogeneous Mixture distributed uniformly throughout mixture; Air; Solutions Heterogeneous Mixture not distributed uniformly throughout mixture; sand & salt; Suspensions Solute substance that is being dissolved; sugar Solvent substance doing the dissolving; water Physical Properties can be seen or observed; mass, volume, density, color, boing/freezing points, hardness, conductivity Chemical Properties cannot be measured without changing identity or composition of matter; flammabil...
  • twishfrancis
    $8.99 Más información
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