Which is denser, ice at 0 degrees C or water at 4 degrees C?

i know water is densest at 4 degrees C, but im not sure if ice is denser.

does ice float?

see the chart on this page.
http://www.simetric.co.uk/si_water.htm

To determine which is denser between ice at 0 degrees Celsius and water at 4 degrees Celsius, we need to understand the relationship between temperature and density of water.

Typically, as a substance cools down, its density increases due to the molecules moving closer together. However, water behaves differently in certain temperature ranges.

At temperatures above 4 degrees Celsius, water follows the conventional behavior, where as it cools, its density increases. This is why ice usually floats on liquid water. However, as water cools from 4 degrees Celsius to its freezing point at 0 degrees Celsius, it undergoes an anomalous expansion instead of further contraction.

This anomalous behavior is a result of the hydrogen bonding between water molecules. As water cools below 4 degrees Celsius, the hydrogen bonding network starts to rearrange, causing water molecules to form larger and more open structures. This expansion leads to a decrease in density of water as it nears the freezing point.

So, in answer to your question, at 0 degrees Celsius, ice is actually denser than water at 4 degrees Celsius. Ice has a higher density due to the open structure formed when water molecules freeze into a solid state.