For an experiment on the titration of a supernatant liquid I need to calculate the number of moles of S2O3^2-^ ion required using the volume of SrIO3 solution(supernatant liquid) from the two trials that were conducted.

For both trials the volume of SrIO3 was 9.5mL. So first I would turn it into liters by doing mol/L X L.

Would this be 9.5mL/1000mL ?

To convert from ml to l, you multiply by

(1/1000) l/ml
or
9.5 ml * (1/1000) l/ml
=0.0095 l

Yes, to convert the volume from milliliters (mL) to liters (L), you can divide the volume by 1000. In this case, since the volume of SrIO3 solution in both trials is 9.5 mL, the conversion would be:

9.5 mL / 1000 mL/L = 0.0095 L

Therefore, the volume of SrIO3 solution is 0.0095 L in both trials.