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Chemical Reactions and Stoichiometry: Interpreting chemical notation.
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<font face="Verdana, Arial, Helvetica, sans-serif" size="5" color="#FFFFFF"><strong>Chemical Reactions and Stoichiometry:</strong> Interpreting chemical notation.</font>
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<td><img src="atomMainIdea.png" width="98" height="58"></td>
<td><font face="Verdana, Arial, Helvetica, sans-serif" size="4">Chemists need a quick way to communicate what happens during a chemical reaction. They use a particular set of symbols to construct a chemical shorthand. In this way they can write down what happens without using long explanatory paragraphs. </font></td>
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<font face="Verdana, Arial, Helvetica, sans-serif" size="4">The
chemical reaction done on the previous pages had two atoms reacting
to form a molecule. Let's let the letter "A" represent a generic
type of atom. Below is a description of the reaction. Click on each
link to see how this description is represented in the chemical
equation to the right.</font>
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<a href="script:textbox:3:load firstA.html"><font face="Verdana, Arial, Helvetica, sans-serif" size="4">one
atom of A</font></a>
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<a href="script:textbox:3:load reactsWith.html"><font face="Verdana, Arial, Helvetica, sans-serif" size="4">reacts
with</font></a>
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<a href="script:textbox:3:load secondA.html"><font face="Verdana, Arial, Helvetica, sans-serif" size="4">another
atom of A</font></a>
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<a href="script:textbox:3:load toForm.html"><font face="Verdana, Arial, Helvetica, sans-serif" size="4">to
form</font></a>
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<a href="script:textbox:3:load aTwo.html"><font face="Verdana, Arial, Helvetica, sans-serif" size="4">a
molecule of A<sub>2</sub></font></a>
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</ol>
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<img height="22" width="200" src="clickAndLook.png">
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<font face="Verdana, Arial, Helvetica, sans-serif" size="4">The substances
you start with are called the <strong>reactants</strong>, and the
substances you end up with are called the <strong>products</strong> .
Letters are used to represent atoms, and numbers are used to represent
amounts of atoms or molecules (or atoms within a molecule represented by
subscripts). Below are a couple of other examples. </font><br><br>
<table width="100%" bgcolor="#E2E2E2" cellspacing="0" cellpadding="5" border="1">
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<strong><em>Chemical Reaction</em></strong>
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<strong><em>Interpretation of the reaction</em> </strong>
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<font size="3" face="Verdana, Arial, Helvetica, sans-serif">AB <img width="18" height="9" src="reactionRight.png">
A + B<br><br><img width="103" height="15" src="atomABtoAandB.gif"></font>
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<font size="3" face="Verdana, Arial, Helvetica, sans-serif">One
molecule of AB (the reactant), chemically reacts to form one atom of
A and one atom of B (the products). </font>
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<font size="3" face="Verdana, Arial, Helvetica, sans-serif">A<sub>2</sub>
+ B<sub>2</sub><img width="18" height="9" src="reactionRight.png"> 2
AB<br><br><img width="130" height="34" src="atomA2andB2to2AB.gif"></font>
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<font size="3" face="Verdana, Arial, Helvetica, sans-serif">One
molecule of A<sub>2</sub> and one of B<sub>2</sub> (the reactants),
chemically react to form 2 molecules of AB (the products). </font>
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<strong><font face="Arial, Helvetica, sans-serif" size="4">Describe what
happens in the following reaction: </font></strong>A + B<sub>2</sub><img height="9" width="18" src="reactionRight.png">
AB + B
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