document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=921435>Question 921435</A>: <I><SPAN STYLE=\"word-break: break-all;\"> How to prepare 500ml of 50percent of ethanol from a bag of 90 percent of ethanol and water. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #558978 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=558978\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> How to prepare 500ml of 50percent of ethanol from a bag of 90 percent of ethanol and water.<BR>\n" );
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document.write( "Equation:<BR>\n" );
document.write( "water + water = water<BR>\n" );
document.write( "0.10x + 1*(500-x) = 0.50*500<BR>\n" );
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document.write( "Multiply thru by 100 to get:<BR>\n" );
document.write( "10x + 100*500 - 100x = 50*500<BR>\n" );
document.write( "-90x = -50*500<BR>\n" );
document.write( "x = (5/9)500<BR>\n" );
document.write( "x = 277.78 ml <BR>\n" );
document.write( "500-x = 222.22 ml (amt of pure water to add)<BR>\n" );
document.write( "===============<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
document.write( "--------------- </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );