Molar mass of nitrogen (N₂)

The molar mass of nitrogen (N₂) is 28.014 g/mol, summed from the IUPAC standard atomic weights of N x 2. Molecular nitrogen, not the atomic weight of the element.

Mass of sample

Amount of substance

mol

Molar mass

28.014g/mol

= Exact Molar mass of nitrogen

Moles in the sample mass: 0.356 964 37 mol
Mass of that amount of substance: 28.014
Molecules in the sample mass: 2.14969e+23

Show the working

Mass of sample = 10
Amount of substance = 1
Molar mass = 14.007*2 = 28.014
Moles in the sample mass = 10 / 28.014 = 0.356 964
Mass of that amount of substance = 1 * 28.014 = 28.014
Molecules in the sample mass = 0.356 964 * NA = 2.14969e+23

Values are shown to six significant figures here; the arithmetic itself runs on exact fractions and is only rounded where a number is printed.

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The formula

Molar mass = sum over elements of (atomic weight x number of atoms)
For N₂: 14.007 x 2 = 28.014 g/mol
Moles = mass / molar mass; mass = moles x molar mass
Molecules = moles x 6.02214076 x 10^23 (the Avogadro constant, exact by definition)

Molar mass in grams per mole is numerically equal to the molecular mass in daltons, so this figure doubles as the molecular weight.

Atomic weights are the IUPAC 2021 standard values. Several elements have a range rather than a single value because isotope ratios vary between sources; the conventional single value is used here.

Molecular nitrogen, not the atomic weight of the element.

Composition by mass

Element	Atoms	Atomic weight	Contribution (g/mol)	Share of mass
Nitrogen (N)	2	14.007	28.014	100 %

Contributions add to the molar mass of 28.014 g/mol. Atomic weights are the IUPAC 2021 standard values.

Frequently asked

What is the molar mass of nitrogen?

28.014 g/mol, for the formula N₂.

How do you convert grams of nitrogen to moles?

Divide the mass in grams by 28.014 g/mol. One gram of nitrogen is 0.0356964 mol.

How many grams are in one mole of nitrogen?

28.014 g, by definition of the molar mass.

Is molar mass the same as molecular weight?

Numerically yes, for the purposes of this calculation. Molecular weight is a dimensionless ratio and molar mass carries units of g/mol, but the digits are identical.

Where the numbers come from

IUPAC 2021 standard atomic weights; Avogadro constant fixed by the 2019 SI.