document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1110771>Question 1110771</A>: <I><SPAN STYLE=\"word-break: break-all;\"> How much water must be added to a bottle of 840cm cubes of acid which contains 10% of pure acid to ontain a solution containing 7% of pure acid?<BR>\n" );
document.write( "Thank u </SPAN>\n" );
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document.write( "Since what is being added is pure water, I would use mental arithmetic to solve this problem.<br><BR>\n" );
document.write( "(1) The amount of acid is 10% of 840 cm^3, or 84 cm^3.<BR>\n" );
document.write( "(2) If that same 84 cm^3 of acid is to be 7% of the final mixture, then the total volume of the final mixture must be 84/.07 = 1200 cm^3.<BR>\n" );
document.write( "(3) You started with 840 cm^3 of solution and finished with 1200 cm^3; the amount of pure water you added was 1200=840 = 360 cm^3. </SPAN>\n" );
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