At what temperature does the competing effects of contraction and expansion produce the smallest volume for liquid water?

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Solution

$4^{o} C$ , the temperature of maximum density for water.
Below that temperature, and the water starts to expand as the crystalline lattice begins to form. Above that temperature, the density drops because of the increased molecular vibrational activity

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At what temperature does the competing effects of contraction and expansion produce the smallest volume for liquid water?

4oC, the temperature of maximum density for water. Below that temperature, and the water starts to expand as the crystalline lattice begins to form. Above that temperature, the density drops because of the increased molecular vibrational activity

$4^{o} C$ , the temperature of maximum density for water.
Below that temperature, and the water starts to expand as the crystalline lattice begins to form. Above that temperature, the density drops because of the increased molecular vibrational activity