Caffeine, C_8H_10N_4O_2, is a stimulant found in tea and coffee. A sample of the substance was dissolved in 45 g of chloroform, CHCl_3, to give a 0.0946 molar solution. How many grams of caffeine were in the sample?

1 Answer
Jan 16, 2018

Is it a 0.0946*mol*L^-1 solution....or a 0.0946*mol*kg^-1 solution....

Explanation:

"Molarity"="Moles of solute"/"Volume of solution"

"Molality"="Moles of solute"/"Kilograms of solvent"

You have not given us the volume of the solution.... I assume that it is approx. 30*mL..(rho_(CHCl_3)=1.489 *g*cm^-3)...but at the moment we cannot address this question.