1) Look up the molar mass of Lasix by Googling "Lasix". Follow the link to Wikipedia. It turns out this is the brand name for Furosemide.
molar mass = 330.745 g/mol
2) Mass of Lasix = (0.0500 L) (2.30 x 10-2 mol/L) (330.745 g/mol) = 0.380 g
3) Weigh the correct mass above on an analytical balance. If your balance has 0.1 mg precision, weigh out 0.3804 g Lasix.
4) Add this to a 50 mL volumetric flask.
5) Add deionized water up to the fill mark.
6) Cap it, and invert multiple times. The solution is ready.
(2.0 mL) (0.03 g/mL) = 60. mg
A s you know that molarity = moles / volume in L
moles = Molarity * Vol in L
get the moles here and convert these moles in gram by suing
moles = mass / molar mass
mass required to dissolve in 50 mL = moles * molar mass ...
Thank you so much. Was really stuck on this question.