A student solution is prepare for the analysis of fluoxymesterone(C20H29FO3),
an anabolic steroid. A stock solution is first prepare by dissolving 10.0 mg of
fluoxymesterone in enough water to give a total volume of 500.0 mL. A 100.0-uL
aliquot (portion) of this solution is diluted to final volume of 100.0mL. Calculate
the concentration of the final solution in terms of molarity.
化學式是C20 H29 FO3
一標準規格的溶液是準備來用於解析fluoxymesterone (C20H29FO3), 一種肌肉增強劑.
- Uncle MichaelLv 710 years agoFavorite Answer
Molar mass of C20H29FO3 = 12x20 + 1x29 + 19 + 16x3 = 336 g/mol
No. of moles of C20H29FO3 = (10/1000)/336 = 2.976 x 10^-5 mol
Volume of the stock solution = 500 mL = 0.5 L
Molarity of the stock solution = (2.976 x 10^-5)/0.5 = 5.952 x 10^-5 M
Consider the further dilution:
Dilution factor = (100/1000000)/(100/1000) = 1/1000
Molarity of the diluted solution = (5.952 x 10^-5) x (1/1000) = 5.952 x 10^-8 MSource(s): Uncle Michael