<html>
<head>
<meta content="text/html; charset=ISO-8859-1"
http-equiv="Content-Type">
</head>
<body bgcolor="#FFFFFF" text="#000000">
<div class="moz-cite-prefix"><br>
On 07/03/13 19:45, wrote:<br>
</div>
<blockquote
cite="mid:C40B2F181831EF44A88CD735258278030261C41AB6@MERCERMAIL.MercerU.local"
type="cite">
<meta http-equiv="Content-Type" content="text/html;
charset=ISO-8859-1">
<div>I looked at the solutions and I never knew they each of
solution was a total 100g, I knew about the first one is 100g
but not the rest of them. Did we have to know right away that
the solution had 100g?<br>
<br>
Sent from my iPhone</div>
<div><br>
</div>
</blockquote>
<br>
In all three of the problems you were given <b>percentage
compositions</b> by <b>mass</b>. If you assume a 100 gram sample
then the percentages become masses in grams.<br>
<br>
This concept was seen in Burdge problem 13.16, 13.18, 13.22, and
somewhat in 13.34. It was also seen in the first and third
additional problem -- so my thinking was that making such a
connection on the quiz would not be too much of a stretch.<br>
<br>
<br>
<br>
<pre class="moz-signature" cols="72">--
Andrew J. Pounds, Ph.D. (<a class="moz-txt-link-abbreviated" href="mailto:pounds_aj@mercer.edu">pounds_aj@mercer.edu</a>)
Professor of Chemistry and Computer Science
Mercer University, Macon, GA 31207 (478) 301-5627
<a class="moz-txt-link-freetext" href="http://faculty.mercer.edu/pounds_aj">http://faculty.mercer.edu/pounds_aj</a>
</pre>
</body>
</html>