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  Chemistry in 24 Hours

Are you taking a chemistry course or preparing for a chemistry exam? If you are learning chemistry now, the Chemistry Tips Weekly is for you--it is a one minute learning each week to the chemistry mastery, free for all students. The chemistry tips will include the follwing topics

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  • Top ten confusions in chemistry
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  • Your professors' confessions
  • Problem-solving tips in chemisrty
  • Plus much more...
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Matter & Energy

Topic Review on "Title":

Chemistry is the study of matter and its changes and interactions.  Matter is anything that has mass and takes up space.  There are two broad categories of matter—Pure Substances and Mixtures. 

Pure Substances
Elements and compounds are both pure substances.  A pure substance is when each particle is identical.  Elements have each atom the same and compounds have each molecule the same.  Compounds are atoms of more than one element chemically bonded together.

Mixtures are more than one type of pure substance physically mixed together.  Mixtures can be categorized into homogeneous and heterogeneous.  Homogeneous mixtures (also called solutions) look the same throughout; while heterogeneous have visible different types of matter.

Energy is the ability to produce heat or do work.  There are two types of energy: Potential energy (or stored energy) and kinetic energy (energy due to motion).

Chemical changes produce a new substance while physical changes do not.  Changes in state (melting, freezing, boiling, condensing, etc.) are physical changes.  Dissolving is also a physical change, although it is often confused for a chemical change.  Reacting with another type of matter, burning or rusting are examples of chemical changes.  Often confused changes are melting (changing a solid to a liquid by adding heat), burning (chemically reacting with oxygen) and dissolving (combining two types of matter physically to produce a mixture).  Mixtures can be separated by physical changes, compounds must be separated by chemical changes and elements cannot be separated by either.

Scientific Processes
There are many paths to follow when undertaking “science”—there is no one scientific method.  Science involves observing, posing questions, forming possible explanations (hypothesis), experimenting, processing/analyzing data, looking for trends, more formation of possible explanations or question posing.  Scientific processes form theories (which attempt to explain observed behavior) and laws (which describe or predict behavior, and are usually mathematical).  A theory cannot become a law—one explains why and one describes what.  A hypothesis is a proposed explanation for why something will occur (that may become a theory with enough evidence), while a prediction is simply a guess at what will happen—it does not attempt to say “why” it will happen.

Rapid Study Kit for "Title":
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"Title" Tutorial Summary :

Chemistry, the study of matter and its interactions is introduced, along with descriptions of classic branches of chemistry (organic, inorganic, physical and analytical).

Matter is defined and categorized into pure substances (compounds or elements) and mixtures (homogeneous or heterogeneous).  Energy is introduced, along with definitions of Potential Energy and Kinetic Energy.

Physical and chemical changes, and physical and chemical properties, are explained with hints as to how to classify a change or property.

Common misconceptions on the process of science are explained correctly: (1) The Scientific Law, (2) Theory versus Law and (3) Prediction versus Hypothesis.

Helpful tips are given on how to study and be successful in a Chemistry course.

Tutorial Features:

Specific Tutorial Features:

  • Organizational chart showing classifications of matter.
  • Molecular visualizations of different types of matter.
  • Common misconceptions pointed out for the student to be aware of.

Series Features:

  • Concept map showing inter-connections of concepts introduced.
  • Definition slides introduce terms as they are needed.
  • Examples given throughout to illustrate how the concepts apply.
  • A concise summary is given at the conclusion of the tutorial.

"Title" Topic List:
  • Definition of Chemistry
  • Matter
    • Pure Substances versus Mixtures
    • Compounds versus Elements
    • Homogeneous versus Heterogeneous
  • Energy
    • Potential versus Kinetic
  • Changes
    • Physical versus Chemical
    • Possible signs of a Chemical Changes
    • Common misconceptions between physical and chemical changes
  • Properties
    • Physical versus Chemical
    • Macroscopic versus Microscopic
  • Scientific Process
    • “The Scientific Method” versus Scientific Processes
    • Theory versus Law
    • Prediction versus Hypothesis

See all 24 lessons in college chemistry, including concept tutorials, problem drills and cheat sheets:
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