about 1014 grams per cubic centimeter

Fresh water has a maximum density at around 4° Celsius….Density of Water (g/cm3) at Temperatures from 0°C (liquid state) to 30.9°C by 0.1°C inc.

The density of water can also be affected by temperature. When the same amount of water is heated or cooled, its density changes. When the water is heated, it expands, increasing in volume. The warmer the water, the more space it takes up, and the lower its density.

Solid water, or ice, is less dense than liquid water. Ice is less dense than water because the orientation of hydrogen bonds causes molecules to push farther apart, which lowers the density.

Since water at about 39°F (4°C) is more dense than water at 32°F (0°C), in lakes and other water bodies the denser water sinks below less-dense water.

The density at the center of a black hole is infinite (it’s a famous “singularity”, which leads to difficulties in modern cosmology). On Earth, densities range from 10-4 g/cm3 for light gases to 0.001 g/cm3 for aerogels and up to the heaviest substance, osmium, with a density of 22.61 g/cm3.

Schwarzschild radius is the limit for anything relative to its mass. So anything that squeezes enough mass into a small section of space beyond this limit will form a black hole. Beyond that density doesn’t really come into it anymore.

Density is a measure of how heavy something is compared to its size. If an object is more dense than water it will sink when placed in water, and if it is less dense than water it will float.

At the modest temperatures and pressures of Earth’s surface, the densest known material is the metallic element osmium, which packs 22 grams into 1 cubic centimetre, or more than 100 grams into a teaspoonful.

Water is more dense (heavier) than oil so they can’t mix. Oil floats above the water.