document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=634177>Question 634177</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I need an equation for finding the unknown mass to add a substance to a solution, when you have a target concentration. <BR>\n" );
document.write( "Ex: I have a solution that weighs 12.0 grams on a balance and I need to know how much mass of a substance to add that nets me 24% by weight of that additional substance in the final solution. (assume sg is =1.0). I am not looking for specifics in molarity or molality. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #399400 by </B><A HREF=/tutors/aboutme.mpl?userid=richwmiller><B>richwmiller(17219)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=richwmiller><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/cgi-bin/show-face.mpl?user=richwmiller><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=399400\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> If you want the other substance to be 24% then .76x=12<BR>\n" );
document.write( "76x=1200<BR>\n" );
document.write( "x=300/19\r<BR>\n" );
document.write( "\n" );
document.write( "If you want the 12 grams to be 24% then <BR>\n" );
document.write( ".24x=12<BR>\n" );
document.write( "24x=1200<BR>\n" );
document.write( "x=50<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );