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$1.00 Chemistry Help

From Chemistry: General-Chemistry
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Due on Feb. 06, 2009
Asked on Feb 02, 2009 at 10:40:37PM

Q:
Calculate the percent by mass of the solute in each of the following aqueous solutions.
(a) 3.36 g of NaBr in 78.2 g of solution
(b) 31.0 g of KCl in 120. g of water
(c) 2.4 g of toluene in 29 g of benzene

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stevesov
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$1.00 Percent by MASS? Ummm... too easy.

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Posted on Feb 03, 2009 at 01:22:24PM

A:
Preview: ... the trap of letting something seem more complicated than it is. Percent by mass of the end result - when you know the mass of the 2 starting bits - is just "percentage of mass". Nothing tricky there.<br><br>The percent by mass of "mass-1 plus mass-2" ... take mass-1 divided by the total mass. Just like any other percent ...

The full tutorial is about 272 words long .

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sudipta

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Posted on Feb 03, 2009 at 03:29:14PM

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Preview: ... nt by mass of NaBr<br>= 3.36 / 78.2 x 100%<br>= ...

The full tutorial is about 40 words long .