Molar mass of nitric oxide (NO)

The molar mass of nitric oxide (NO) is 30.006 g/mol, summed from the IUPAC standard atomic weights of N, O.

Mass of sample

Amount of substance

mol

Molar mass

30.006g/mol

= Exact Molar mass of nitric oxide

Moles in the sample mass: 0.333 266 68 mol
Mass of that amount of substance: 30.006
Molecules in the sample mass: 2.00698e+23

Show the working

Mass of sample = 10
Amount of substance = 1
Molar mass = 14.007 + 15.999 = 30.006
Moles in the sample mass = 10 / 30.006 = 0.333 267
Mass of that amount of substance = 1 * 30.006 = 30.006
Molecules in the sample mass = 0.333 267 * NA = 2.00698e+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 NO: 14.007 + 15.999 = 30.006 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.

Composition by mass

Element	Atoms	Atomic weight	Contribution (g/mol)	Share of mass
Oxygen (O)	1	15.999	15.999	53.319 %
Nitrogen (N)	1	14.007	14.007	46.681 %

Contributions add to the molar mass of 30.006 g/mol. Atomic weights are the IUPAC 2021 standard values.

Frequently asked

What is the molar mass of nitric oxide?

30.006 g/mol, for the formula NO.

How do you convert grams of nitric oxide to moles?

Divide the mass in grams by 30.006 g/mol. One gram of nitric oxide is 0.0333267 mol.

How many grams are in one mole of nitric oxide?

30.006 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.