0.000341 g fluorescein (332.32 g/mol) is dissolved in 255 mL solution of ethanol. The density of ethanol is 0.785 g/mL.
What is the concentration of the solution in molarity (M)?
nevermind, got it!
mols fluorescein = grams/molar mass
M = mols/0.255L soln.
thank you i figured it out right before you posted this :)
To find the concentration of the solution in molarity (M), we need to calculate the number of moles of fluorescein and the volume of the solution.
Step 1: Calculate the number of moles of fluorescein:
Mass of fluorescein = 0.000341 g
Molar mass of fluorescein = 332.32 g/mol
Number of moles of fluorescein = Mass of fluorescein / Molar mass of fluorescein
= 0.000341 g / 332.32 g/mol
Step 2: Calculate the volume of the solution in liters:
Volume of solution = 255 mL
= 255 mL * (1 L / 1000 mL)
= 0.255 L
Step 3: Calculate the concentration in molarity (M):
Concentration (M) = Number of moles / Volume of solution
= Number of moles of fluorescein / Volume of solution
= (0.000341 g / 332.32 g/mol) / 0.255 L
Simplifying the calculation:
Concentration (M) = (0.000341 / 332.32) / 0.255
≈ 0.000003239 M
Therefore, the concentration of the solution is approximately 0.000003239 M.