What is the chemical composition of a single water molecule?
A single water molecule contains two hydrogen atoms and one oxygen atom. The angle between these hydrogen atoms measures 104.5 degrees.
Questions about Water
Short answers, pulled from the story.
At what temperature does water reach maximum density under standard pressure?
Water reaches maximum density at 4 degrees Celsius under standard pressure. Below that temperature it expands becoming less dense until freezing point.
How much liquid water covers Earth's surface area?
Liquid water covers about 71 percent of the planet's surface area. Oceans hold roughly 96.5 percent of all water volume.
When did France define the gram based on pure water volume?
On the 7th of April 1795 France defined the gram as weight of pure water volume equaling a cube of one-hundredth meter. Scientists measured density at melting ice temperature but later chose highest water density point instead.
Which celestial body possesses a subsurface ocean approximately 10 kilometers thick below its south polar surface?
Europa moon possesses subsurface ocean approximately 10 kilometers thick below south polar surface. Titan holds possible subsurface layer mixed with ammonia beneath crust.