See the answer below.
Work Step by Step
The temperature is the same so: $PV=constant$ $56.5\ mmHg×125.\ mL=62.3\ mmHg×V$ $V=113.4\ mL$
You can help us out by revising, improving and updating this answer.Update this answer
After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.