Question

Which type of water is the most dense?

A.
warm water with no salt

B.
cold water with high salt content

C.
warm, salty water

D.
cold water with low salt content

Answer 1

"Heavy water" (deuterium oxide) is the most dense form of water. It has a density 11% greater than normal water (hydrogen oxide). For normal water, it is most dense at 4 degrees C. Below that it begins to decrease in density. That particular quirk of water physics makes it possible for life to exist on earth. If ice did not float, well.... you can imagine the rest...

Deuterium is NOT "H3O." H3O+ is a protonated ion of hydrogen oxide referred to as hydronium. Heavy water is H2O, except one of the two hydrogens happens to be a heavier isotope of hydrogen known as deuterium. (atomic mass of 2.014 as opposed to an atomic mass of 1.007 for normal hydrogen or protium).

Answer 2

salt water at about 0 Celcius (even though it is technically not frozen yet).

Answer 3

Warm salt water. Because the water is warmer it allows more salt to dissolve. The solubility of the salt in the water increases as the water becomes warm

Answer 4

nope i'm sure about it