posted by Lilian .
If you have a 8M solution of H2SO4 how do you produce 105 ml of .25 M solution?
mL x M = mL x M
105 mL x 0.25 M = ??mL x 8 M.
So you take ??mL of the 8 M and make it to a total volume of 105. The resulting solution will be 0.25 M.