Molar mass of asparagine (C₄H₈N₂O₃)

The molar mass of asparagine (C₄H₈N₂O₃) is 132.119 g/mol, summed from the IUPAC standard atomic weights of C x 4, H x 8, N x 2, O x 3.

Mass of sample

Amount of substance

mol

Molar mass

132.119g/mol

= Exact Molar mass of asparagine

Moles in the sample mass: 0.075 689 341 mol
Mass of that amount of substance: 132.119
Molecules in the sample mass: 4.55812e+22

Show the working

Mass of sample = 10
Amount of substance = 1
Molar mass = 12.011*4 + 1.008*8 + 14.007*2 + 15.999*3 = 132.119
Moles in the sample mass = 10 / 132.119 = 0.075 689 3
Mass of that amount of substance = 1 * 132.119 = 132.119
Molecules in the sample mass = 0.075 689 3 * NA = 4.55812e+22

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 C₄H₈N₂O₃: 12.011 x 4 + 1.008 x 8 + 14.007 x 2 + 15.999 x 3 = 132.119 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
Carbon (C)	4	12.011	48.044	36.364 %
Oxygen (O)	3	15.999	47.997	36.329 %
Nitrogen (N)	2	14.007	28.014	21.204 %
Hydrogen (H)	8	1.008	8.064	6.1036 %

Contributions add to the molar mass of 132.119 g/mol. Atomic weights are the IUPAC 2021 standard values.

Frequently asked

What is the molar mass of asparagine?

132.119 g/mol, for the formula C₄H₈N₂O₃.

How do you convert grams of asparagine to moles?

Divide the mass in grams by 132.119 g/mol. One gram of asparagine is 0.00756893 mol.

How many grams are in one mole of asparagine?

132.119 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.