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McClinton, Debbie
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Vapor pressure is the pressure exerted by molecules in the gas phase in equilibrium with a liquid or a solid. Two examples are used to illustrate vapor pressure: the drying of clothes and the evaporation of ice.
- Subjects:
- Chemistry
- Keywords:
- Vapor pressure
- Resource Type:
- Others
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Video
In this screencast, we review the positions of metals, metalloids, and nonmetals in the Periodic Table and the general characteristics of each.
- Subjects:
- Chemistry
- Keywords:
- Periodic table of the elements Chemical elements
- Resource Type:
- Video
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Others
In this well-illustrated object, learners examine the structures and properties of the four types of solids: molecular, metallic, ionic, and covalent network. Five interactive questions are provided.
- Subjects:
- Chemistry
- Keywords:
- Solid state chemistry
- Resource Type:
- Others
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Others
Learners examine how chemists use moles to "count" atoms by weight. Examples are given.
- Subjects:
- Chemistry
- Keywords:
- Mole (Chemistry) Chemical elements Avogadro's law
- Resource Type:
- Others
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Others
In this interactive object, learners determine the limiting reagent and the excess reagent in chemical reactions. Learners test their knowledge by solving three problems.
- Subjects:
- Chemistry
- Keywords:
- Chemical processes Chemical reactions
- Resource Type:
- Others
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Others
Learners examine how vapor pressure is calculated. The vapor pressure of a liquid increases with increasing temperature. If the heat of vaporization and the vapor pressure at one temperature are known, the vapor pressure at a second temperature can be calculated.
- Subjects:
- Chemistry
- Keywords:
- Vapor pressure
- Resource Type:
- Others
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Video
Learners examine the meaning of theoretical yield, actual yield, and percent yield. They test their knowledge by solving two problems.
- Subjects:
- Chemistry
- Keywords:
- Chemical reactions
- Resource Type:
- Video
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Others
Learners examine how melting, vaporization, and sublimation require energy input while freezing and condensation release energy.
- Subjects:
- Chemistry
- Keywords:
- Thermodynamics Phase transformations (Statistical physics)
- Resource Type:
- Others
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Others
Learners examine phase diagrams that show the phases of solid, liquid, and gas as well as the triple point and critical point.
- Subjects:
- Chemistry
- Keywords:
- Phase diagrams
- Resource Type:
- Others
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Video
Learners examine the method used to calculate the mass percent of an element in a compound. Three examples and one problem illustrate the method.
- Subjects:
- Chemistry
- Keywords:
- Chemistry -- Notation Chemical elements
- Resource Type:
- Video
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Others
Learners examine the meaning of oxidation, reduction, and half-reaction, and watch a film showing the deposition of copper metal from the reduction of copper (II) ion by aluminum. A brief quiz completes the activity.
- Subjects:
- Chemistry
- Keywords:
- Reduction (Chemistry) Chemical reactions Oxidation Oxidation-reduction reaction
- Resource Type:
- Others
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Others
Learners examine the periodic table to identify metallic elements that have either fixed or variable oxidation states.
- Subjects:
- Chemistry
- Keywords:
- Reduction (Chemistry) Chemical reactions Oxidation Oxidation-reduction reaction
- Resource Type:
- Others
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Others
Learners assign oxidation numbers to atoms in neutral compounds and in polyatomic ions. Six examples are worked through in detail, and three problems are provided.
- Subjects:
- Chemistry
- Keywords:
- Reduction (Chemistry) Chemical reactions Oxidation Oxidation-reduction reaction
- Resource Type:
- Others
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Others
Learners examine a table of common polyatomic ions. Eight examples are provided for practice.
- Subjects:
- Chemistry
- Keywords:
- Chemical processes Chemical reactions
- Resource Type:
- Others
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Others
Roman numerals are used to identify the charges on metal cations having multiple oxidation states. Five examples are provided for practice.
- Subjects:
- Chemistry
- Keywords:
- Ionic structure Ions
- Resource Type:
- Others
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Others
Learners examine a table containing the names of common cations and anions.
- Subjects:
- Chemistry
- Keywords:
- Ionic structure Ions
- Resource Type:
- Others
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Others
Learners use the coefficients in a balanced equation to develop the mole ratios of reactants and products involved in the reaction. Five interactive examples illustrate the method, and students test their knowledge by working four problems.
- Subjects:
- Chemistry
- Keywords:
- Chemical reactions Chemical equations
- Resource Type:
- Others
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Others
Learners observe that the melting of a solid and the freezing of its liquid occur at the same temperature. The melting point is an intrinsic property and is used to identify a substance.
- Subjects:
- Chemistry
- Keywords:
- Melting points Freezing points
- Resource Type:
- Others
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Others
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Others
Ions are electrically charged particles obtained from an atom or from a chemically bonded group of atoms by adding or removing electrons. Eight examples illustrate the number of protons, neutrons, and electrons in positive ions (cations) and in negative ions (anions).