The molecular mass of nitrogen (N₂) is 28 g/mol, and its atomic mass is 14 g/mol. The molecular mass is the total mass of all the atoms in a molecule of nitrogen. Since a nitrogen molecule consists of two nitrogen atoms bonded together, the atomicity of nitrogen is determined as follows:
Steps to Calculate the Molecular Mass of Nitrogen
The molecular mass is calculated based on the atomic mass of a single nitrogen atom, which is 14 g/mol. And, atomicity refers to the number of atoms in a molecule of an element.
- Atomicity = Molecular Mass / Atomic Mass
- Atomicity = 28 / 14 = 2
The atomicity of nitrogen is 2, indicating that a nitrogen molecule (N₂) consists of two nitrogen atoms.
Formula and Calculation:
Since a nitrogen molecule (N₂) consists of two nitrogen atoms, the molecular mass is:
- Molecular Mass = 2 × Atomic Mass
- Molecular Mass = 2 × 14 = 28 g/mol
So, the molecular mass of Nitrogen (N₂) is 28 g/mol
Interesting Facts
- Nitrogen is a diatomic molecule, meaning it naturally exists as two atoms bonded together.
- It is a major component of the Earth’s atmosphere, making up around 78% by volume.
- The molecular mass is crucial in stoichiometry for chemical reactions involving nitrogen.
- Molecular Mass in Chemistry: Used to calculate moles, balance chemical equations, and determine reactant or product quantities.
- Atomicity: Helps classify elements as monoatomic (e.g., noble gases), diatomic (e.g., nitrogen, oxygen), or polyatomic (e.g., phosphorus).
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