# Chemistry

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200. g of a solvent is available, how many grams of a solute should be weighed out to make a 15.0% solution by mass?

• Chemistry -

What's the definition of mass percent?
% = (mass solute/100 g solution)*100.
mass solute = x
mass solution = 200 g solvent + x g solute = 200+x
Substitute and solve for x.
(x/x+200)*100 = 15
x=??

• Chemistry -

still not making sense because answers are
a. 30.0
b. 35.3
c. 15.0
d. 28.9

• Chemistry -

Then you made a math error because the correct answer is listed.

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