basic math question - Molarity (May/08/2009 )

Hi,

I have a liquid that has a molecular weight of 108.16 g/mol. I need a final concentration of 4.5 x 10^-4 M. How do I find out the initial molarity (mol/L) of my liquid? Is there any information I'm missing?

Thanks!

Loris on May 8 2009, 03:47 PM said:

it depends on how many grams are in your initial solution. g/mol is a measure of mass per quantity, mol/L is a measure of quantity to volume. A volume of feathers has a different mass than the same volume of lead.

Loris, you need the density of your liquid.