O76N7HeAr2BS9H8U92Pu901UO2I2K2Na20LiF molar mass

Molar Mass, Molecular Weight and Elemental Composition Calculator

Molar mass of O₇₆N₇HeAr₂BS₉H₈U₉₂Pu₉₀₁UO₂I₂K₂Na₂₀LiF is 239174.4407 g/mol

Convert between O₇₆N₇HeAr₂BS₉H₈U₉₂Pu₉₀₁UO₂I₂K₂Na₂₀LiF weight and moles

Compound	Moles		Weight, g
O₇₆N₇HeAr₂BS₉H₈U₉₂Pu₉₀₁UO₂I₂K₂Na₂₀LiF

Elemental composition of O₇₆N₇HeAr₂BS₉H₈U₉₂Pu₉₀₁UO₂I₂K₂Na₂₀LiF

Element	Symbol	Atomic weight	Atoms	Mass percent
Oxygen	O	15.9994	78	0.5218
Nitrogen	N	14.0067	7	0.0410
Helium	He	4.002602	1	0.0017
Argon	Ar	39.948	2	0.0334
Boron	B	10.811	1	0.0045
Sulfur	S	32.065	9	0.1207
Hydrogen	H	1.00794	8	0.0034
Uranium	U	238.02891	93	9.2555
Plutonium	Pu	238.049560	901	89.6762
Iodine	I	126.90447	2	0.1061
Potassium	K	39.0983	2	0.0327
Sodium	Na	22.98976928	20	0.1922
Lithium	Li	6.941	1	0.0029
Fluorine	F	18.9984032	1	0.0079

Computing molar mass step by step
First, compute the number of each atom in O₇₆N₇HeAr₂BS₉H₈U₉₂Pu₉₀₁UO₂I₂K₂Na₂₀LiF: O: 78, N: 7, He: 1, Ar: 2, B: 1, S: 9, H: 8, U: 93, Pu: 901, I: 2, K: 2, Na: 20, Li: 1, F: 1 Then, lookup atomic weights for each element in periodic table: O: 15.9994, N: 14.0067, He: 4.002602, Ar: 39.948, B: 10.811, S: 32.065, H: 1.00794, U: 238.02891, Pu: 238.0495599, I: 126.90447, K: 39.0983, Na: 22.98976928, Li: 6.941, F: 18.9984032 Now, compute the sum of products of number of atoms to the atomic weight: Molar mass (O₇₆N₇HeAr₂BS₉H₈U₉₂Pu₉₀₁UO₂I₂K₂Na₂₀LiF) = ∑ Count_i * Weight_i = Count(O) * Weight(O) + Count(N) * Weight(N) + Count(He) * Weight(He) + Count(Ar) * Weight(Ar) + Count(B) * Weight(B) + Count(S) * Weight(S) + Count(H) * Weight(H) + Count(U) * Weight(U) + Count(Pu) * Weight(Pu) + Count(I) * Weight(I) + Count(K) * Weight(K) + Count(Na) * Weight(Na) + Count(Li) * Weight(Li) + Count(F) * Weight(F) = 78 * 15.9994 + 7 * 14.0067 + 1 * 4.002602 + 2 * 39.948 + 1 * 10.811 + 9 * 32.065 + 8 * 1.00794 + 93 * 238.02891 + 901 * 238.0495599 + 2 * 126.90447 + 2 * 39.0983 + 20 * 22.98976928 + 1 * 6.941 + 1 * 18.9984032 = 239174.4407 g/mol

Mass percent composition	Atomic percent composition

Formula in Hill system is Ar₂BFH₈HeI₂K₂LiN₇Na₂₀O₇₈Pu₉₀₁S₉U₉₃

Computing molar mass (molar weight)

To calculate molar mass of a chemical compound enter its formula and click 'Compute'. In chemical formula you may use:

Any chemical element. Capitalize the first letter in chemical symbol and use lower case for the remaining letters: Ca, Fe, Mg, Mn, S, O, H, C, N, Na, K, Cl, Al.
Functional groups: D, T, Ph, Me, Et, Bu, AcAc, For, Tos, Bz, TMS, tBu, Bzl, Bn, Dmg
parenthesis () or brackets [].
Common compound names.

Examples of molar mass computations: NaCl, Ca(OH)2, K4[Fe(CN)6], CuSO4*5H2O, nitric acid, potassium permanganate, ethanol, fructose, caffeine, water.

Molar mass calculator also displays common compound name, Hill formula, elemental composition, mass percent composition, atomic percent compositions and allows to convert from weight to number of moles and vice versa.

Computing molecular weight (molecular mass)

To calculate molecular weight of a chemical compound enter it's formula, specify its isotope mass number after each element in square brackets.
Examples of molecular weight computations: C[14]O[16]2, S[34]O[16]2.

Definitions

Molecular mass (molecular weight) is the mass of one molecule of a substance and is expressed in the unified atomic mass units (u). (1 u is equal to 1/12 the mass of one atom of carbon-12)
Molar mass (molar weight) is the mass of one mole of a substance and is expressed in g/mol.
Mole is a standard scientific unit for measuring large quantities of very small entities such as atoms and molecules. One mole contains exactly 6.022 ×10²³ particles (Avogadro's number)

Steps to calculate molar mass

Identify the compound: write down the chemical formula of the compound. For example, water is H₂O, meaning it contains two hydrogen atoms and one oxygen atom.
Find atomic masses: look up the atomic masses of each element present in the compound. The atomic mass is usually found on the periodic table and is given in atomic mass units (amu).
Calculate molar mass of each element: multiply the atomic mass of each element by the number of atoms of that element in the compound.
Add them together: add the results from step 3 to get the total molar mass of the compound.

Example: calculating molar mass

Let's calculate the molar mass of carbon dioxide (CO₂):

Carbon (C) has an atomic mass of about 12.01 amu.
Oxygen (O) has an atomic mass of about 16.00 amu.
CO₂ has one carbon atom and two oxygen atoms.
The molar mass of carbon dioxide is 12.01 + (2 × 16.00) = 44.01 g/mol.

Lesson on computing molar mass

Weights of atoms and isotopes are from NIST article.

molecular weights calculated today

Please let us know how we can improve this web app.

How to cite?

Choose languageDeutschEnglishEspañol Français Italiano Nederlands Polski Português Русский 中文日本語 한국어