document.write( "Question 1196958: A 900-gram salt-and-water solution contains 80 g of salt. This mixture is left in the open air, and 100 g of water evaporates from the solution. What is the percent concentration of salt in the remaining solution? \r
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Algebra.Com's Answer #829998 by ikleyn(52781) $\"\"$ $\"About$

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\n" ); document.write( "A 900-gram salt-and-water solution contains 80 g of salt.
\n" ); document.write( "This mixture is left in the open air, and 100 g of water evaporates
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document.write( "    |   Water evaporates, the salt not.  |\r\n" );
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document.write( "After evaporation 100 g of water, the mass of the mixture is 900 - 100 = 800 grams.\r\n" );
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document.write( "Of this mass, 80 grams is salt: it remains with no change.\r\n" );
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document.write( "So, the mass concentration of the remaining mixture is  \r\n" );
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document.write( "     =  = 0.1 grams of salt per gram of the resulting mixture.    ANSWER\r\n" );
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The major lesson to learn from my solution is THIS :

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