Answer:
4.50 L
Explanation:
First we calculate how many moles are there in 3.84 L of a 8.50 mol/L solution:
Now, keeping in mind that
we can calculate the volume of a 7.25 mol/L solution that would contain 32.64 moles:
So we could take 4.50 L of the 7.25 mol/L solution and evaporate the solvent until only 3.84 L remain.