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Results for: Creator / Instructor Douglass, Miriam Remove constraint Creator / Instructor: Douglass, Miriam Language English Remove constraint Language: English

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    Determining Empirical and Molecular Formulas (Screencast)

    Determining Empirical and Molecular Formulas (Screencast)

    Learners follow a four-step process to determine the empirical formula of a compound from the masses of its constituent elements. The molecular formula is determined in a fifth step using the molecular weight of the compound.

    Subjects:
    Chemistry
    Keywords:
    Molecular weights Chemistry Physical theoretical
    Resource Type:
    Others
     
  • Video 
    Electromagnetic Radiation (Screencast)

    Electromagnetic Radiation (Screencast)

    In this animated and interactive object, learners examine the inverse proportionality of wavelength and frequency and their relationship to the speed of light.

    Subjects:
    Chemistry
    Keywords:
    Electromagnetic waves
    Resource Type:
    Video
     
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    Energy in Chemical Reactions

    Energy in Chemical Reactions

    In this animated and interactive object, learners examine kinetic and potential energy as well as the first law of thermodynamics and the flow of energy between a system and its surroundings. Students also answer questions about exothermic and endothermic reactions

    Subjects:
    Chemistry
    Keywords:
    Chemical processes Chemical reactions
    Resource Type:
    Others
     
  • Video 
    Enthalpy (Screencast)

    Enthalpy (Screencast)

    In this interactive object, learners calculate the amount of heat evolved or absorbed in chemical reactions. Four practice problems are provided.

    Subjects:
    Chemistry
    Keywords:
    Enthalpy Thermochemistry
    Resource Type:
    Video
     
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    Gas Volume and Molar Amount

    Gas Volume and Molar Amount

    In this brief object, learners examine the direct relationship between the volume of a gas sample and the number of moles of gas. A problem is presented so students can test their knowledge of Avogadro's Law.

    Subjects:
    Chemistry
    Keywords:
    Natural gas -- Measurement
    Resource Type:
    Others
     
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    Gas Volume vs. Pressure (Boyle's Law)

    Gas Volume vs. Pressure (Boyle's Law)

    Boyle's Law states that gas volume varies inversely with the pressure at constant temperature and is described by the equation PV = constant. An example of a sample of gas at two conditions of P and V is used to illustrate the law.

    Subjects:
    Chemistry
    Keywords:
    Boyle's law Gas laws (Physical chemistry)
    Resource Type:
    Others
     
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    Gas Volume vs. Temperature (Charles's Law)

    Gas Volume vs. Temperature (Charles's Law)

    In this animated object, learners examine how gas volume varies directly with absolute temperature (K at constant pressure). An example of a sample of gas at two conditions of volume and temperature is used to illustrate the law.

    Subjects:
    Chemistry
    Keywords:
    Charles' law Gas laws (Physical chemistry) Gase -- Thermal properties
    Resource Type:
    Others
     
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    Heat of Fusion and Heat of Vaporization

    Heat of Fusion and Heat of Vaporization

    Learners examine graphs and read that the heat of fusion is the heat energy absorbed by one mole of solid as it is converted to liquid, while the heat of vaporization is the heat energy absorbed by one mole of liquid as it is converted to gas.

    Subjects:
    Chemistry
    Keywords:
    Heat
    Resource Type:
    Others
     
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    Ideal Gas Law

    Ideal Gas Law

    In this interactive object, learners use the ideal gas law to solve a practice problem.

    Subjects:
    Chemistry
    Keywords:
    Gas laws (Physical chemistry)
    Resource Type:
    Others
     
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    Intermolecular Forces

    Intermolecular Forces

    In this well-illustrated activity, learners examine the three types of intermolecular forces: dipole-dipole forces, London or Van der Waals forces, and the hydrogen bond. Two interactive questions are included.

    Subjects:
    Chemistry
    Keywords:
    Intermolecular forces Molecules
    Resource Type:
    Others