On The Nature of Water
To begin any discussion on the nature of water is to first recognize how it appears in nature. Water (H2O) is the most abundant compound on Earth’s surface, covering more than 70 percent of Earth’s surface. In nature, it exists in liquid, solid, and gaseous states.
It is in dynamic equilibrium between the liquid and gas states at standard temperature and pressure. At room temperature, it is a tasteless and odorless liquid, nearly colorless with a hint of blue (associated with the oxygen atom).
Many substances dissolve in water and it is commonly referred to as the universal solvent. Because of this, water in nature (and use) is rarely pure and some properties may vary from those of the pure substance. It is the only common substance found naturally in all three common states of matter.
It is essential for all life on Earth, and makes up to 78% of the human body.

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