posted by CC .
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?
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
still not making sense because answers are
Then you made a math error because the correct answer is listed.