Answer:
8.13 mL
Step-by-step explanation:
The required volume can be found by using the formula for Boyle's law
![V_2 = (P_1V_1)/(P_2) \\](https://img.qammunity.org/2022/formulas/chemistry/high-school/41t0mxtqsijh5dtc61xtjhtlpqanun6835.png)
where
P1 is the initial pressure
P2 is the final pressure
V1 is the initial volume
V2 is the final volume
From the question we have
![V_2 = (6.5 * 1.25)/(1) = 6.5 * 1.25 \\ = 8.125](https://img.qammunity.org/2022/formulas/chemistry/college/clijyeffe3vuuhftq7z2gpm7pfgn6lts40.png)
We have the final answer as
8.13 mL
Hope this helps you