document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=803320>Question 803320</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A chemist has a 100 mL beaker of a 30% solution.\r<BR>\n" );
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document.write( "a. Write an equation for the concentration of the solution after adding x mL of pure water.\r<BR>\n" );
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document.write( "b. Use that equation to determine how many mL of water should be added to obtain a 7% solution. Round your answer to 1 decimal place. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #484273 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=484273\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\">  A chemist has a 100 mL beaker of a 30% solution. <BR>\n" );
document.write( "a. Write an equation for the concentration of the solution after adding x mL of pure water.<BR>\n" );
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document.write( "Equation:<BR>\n" );
document.write( "active + active = active<BR>\n" );
document.write( "0.30*100 + 0*x = c(100+x)<BR>\n" );
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document.write( "b. Use that equation to determine how many mL of water should be added to obtain a 7% solution. Round your answer to 1 decimal place.<BR>\n" );
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document.write( "30*100 + 0*x = 0.07(100 + x)<BR>\n" );
document.write( "30*100 +  0 = 7*100 + 7x<BR>\n" );
document.write( "7x = 21*100<BR>\n" );
document.write( "x = 300 mL (amt of water to add)<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
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