1) List the known values.
Solute: 255 mg
Solution: 650 mL
Unknown
Percent concentration:
2) Set the equation
[tex]\frac{mass}{volume}\%=\frac{grams\text{ }of\text{ }solute}{milliliters\text{ }of\text{ }solution}*100[/tex]Convert milligrams to grams
1 g = 1000 mg
[tex]g=255mg*\frac{1g}{1000mg}=0.255g[/tex]3) Plug in known values.
[tex]\frac{mass}{volume}\%=\frac{0.255g\text{ }of\text{ }solute}{650\text{ }mL\text{ }of\text{ }solution}*100[/tex][tex]=0.039231\%[/tex]The percent concentration of the drug is 0.039%(m/V)
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