[peptea]

a 40% (w/w or weight/weight) solution of H2SO4 (molar mass of 98.09 g/mol) in water has a density of 1.395 g/ml. What is its molarity and molality?

I did get answers for this problem, but I want to check my steps with others..

for the Molarity, first I assumed that I had 1000 ml of solution in order to find the grams of H2SO4, from which I could find the moles of H2SO4 and thus, the M

for the molality, I used the number of grams of H2SO4 (found from the Molarity part of the problem) to find the number of grams of water (the solvent) to calculate the molality.

I hope I'm right...

I got 5.69 M and 6.80 m. anyone else too?

[Borek]

I got 5.69 M and 6.80 m. anyone else too?

Looks OK

[peptea]

thanks!