EVAN OTO / SCIENCE PHOTO LIBRARY EVAN OTO / SCIENCE PHOTO LIBRARY
A molecular illustration of a water molecule (H2O), formed by one oxygen atom covalently bonded to two hydrogen atoms. Water has the ability to appear as a solid, liquid or gas depending on surrounding temperature and pressure. Water is known as a universal solvent, referring to its ability to dissolve hydrophilic ( water-loving ) salts, sugars, proteins or gases. However, substances such as fats and oils are hydrophobic ( water-fearing ), meaning they will not dissolve in water.
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