What is the chemical formula for water?

The chemical formula for water is H2O, which indicates that each molecule of water is composed of two hydrogen atoms bonded to one oxygen atom. This distinctive combination is essential for the unique properties of water, such as its ability to dissolve a wide variety of substances, its high specific heat capacity, and its role as a solvent in biological systems. The structural arrangement promotes hydrogen bonding, which contributes significantly to phenomena like surface tension and the fact that water is less dense as a solid compared to its liquid state. Understanding H2O is fundamental in various scientific fields, including chemistry, biology, and environmental science, as it plays a crucial role in life processes and ecosystems.