The MR (Molar Mass) of O2 (Dioxygen) is 31.999 g/mol.
Molar mass is a physical property defined as the mass of a given substance (chemical element or chemical compound) divided by the amount of substance. It is expressed in grams per mole (g/mol). Understanding molar mass is crucial for stoichiometry, allowing for the conversion between mass and moles in chemical reactions.
Here's a breakdown of how the molar mass of O2 is calculated:
- O2 consists of two oxygen atoms.
- The atomic mass of oxygen (O) is approximately 15.999 g/mol.
- *Therefore, the molar mass of O2 is 2 15.999 g/mol = 31.999 g/mol.**
In summary, the molar mass of oxygen gas (O2) is precisely 31.999 grams per mole, a value essential for chemical calculations involving oxygen.
