document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=944226>Question 944226</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The pH level of a type of vinegar is 2.9. What is the hydrogen-ion concentration [H+] for the vinegar? Use the formula  pH= -logv10[H^+]\r<BR>\n" );
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document.write( "       A.&#8776; 0.0013 M<BR>\n" );
document.write( "       B.&#8776; 0.0046 M<BR>\n" );
document.write( "       C.&#8776; 0.13 M<BR>\n" );
document.write( "       D.&#8776; 0.46 M </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #575736 by </B><A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><B>josgarithmetic(39620)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><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=575736\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Better notation,  pH=-log([H^+]), about the best to be done this way because the rendering will destroy part of it.  A more convenient way to express this could be pH=-log(H), and we just need to know we are using base ten.\r<BR>\n" );
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document.write( "-log(H)=2.9\r<BR>\n" );
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document.write( "log(H)=-2.9\r<BR>\n" );
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document.write( "The meaning is, <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=HydroniumMolarity=10%5E%28-2.9%29 ALIGN=MIDDLE  ALT=\"HydroniumMolarity=10%5E%28-2.9%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "Near 0.00126 M.  You want to take this to two significant figures. </SPAN>\n" );
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