Answer
A given amount of water occupies the smallest volume (and is the densest) at $4^{\circ} C$.
Work Step by Step
This is discussed on page 294, and shown in Figures 15.20-15.21.
You can help us out by revising, improving and updating this answer.
Update this answerAfter 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.