NB9870W1220K233Fe100CO96Zr80Zn74U22F12Cl8N5O3Ar2Xe2HO2H2He2V molar mass

Molar Mass, Molecular Weight and Elemental Composition Calculator

Molar mass of NB₉₈₇₀W₁₂₂₀K₂₃₃Fe₁₀₀CO₉₆Zr₈₀Zn₇₄U₂₂F₁₂Cl₈N₅O₃Ar₂Xe₂HO₂H₂He₂V is 365684.4976 g/mol

Convert between NB₉₈₇₀W₁₂₂₀K₂₃₃Fe₁₀₀CO₉₆Zr₈₀Zn₇₄U₂₂F₁₂Cl₈N₅O₃Ar₂Xe₂HO₂H₂He₂V weight and moles

Compound	Moles		Weight, g
NB₉₈₇₀W₁₂₂₀K₂₃₃Fe₁₀₀CO₉₆Zr₈₀Zn₇₄U₂₂F₁₂Cl₈N₅O₃Ar₂Xe₂HO₂H₂He₂V

Elemental composition of NB₉₈₇₀W₁₂₂₀K₂₃₃Fe₁₀₀CO₉₆Zr₈₀Zn₇₄U₂₂F₁₂Cl₈N₅O₃Ar₂Xe₂HO₂H₂He₂V

Element	Symbol	Atomic weight	Atoms	Mass percent
Nitrogen	N	14.0067	6	0.0230
Boron	B	10.811	9870	29.1794
Tungsten	W	183.84	1220	61.3329
Potassium	K	39.0983	233	2.4912
Iron	Fe	55.845	100	1.5271
Carbon	C	12.0107	1	0.0033
Oxygen	O	15.9994	101	0.4419
Zirconium	Zr	91.224	80	1.9957
Zinc	Zn	65.38	74	1.3230
Uranium	U	238.02891	22	1.4320
Fluorine	F	18.9984032	12	0.0623
Chlorine	Cl	35.453	8	0.0776
Argon	Ar	39.948	2	0.0218
Xenon	Xe	131.293	2	0.0718
Hydrogen	H	1.00794	3	0.0008
Helium	He	4.002602	2	0.0022
Vanadium	V	50.9415	1	0.0139

Computing molar mass step by step
First, compute the number of each atom in NB₉₈₇₀W₁₂₂₀K₂₃₃Fe₁₀₀CO₉₆Zr₈₀Zn₇₄U₂₂F₁₂Cl₈N₅O₃Ar₂Xe₂HO₂H₂He₂V: N: 6, B: 9870, W: 1220, K: 233, Fe: 100, C: 1, O: 101, Zr: 80, Zn: 74, U: 22, F: 12, Cl: 8, Ar: 2, Xe: 2, H: 3, He: 2, V: 1 Then, lookup atomic weights for each element in periodic table: N: 14.0067, B: 10.811, W: 183.84, K: 39.0983, Fe: 55.845, C: 12.0107, O: 15.9994, Zr: 91.224, Zn: 65.38, U: 238.02891, F: 18.9984032, Cl: 35.453, Ar: 39.948, Xe: 131.293, H: 1.00794, He: 4.002602, V: 50.9415 Now, compute the sum of products of number of atoms to the atomic weight: Molar mass (NB₉₈₇₀W₁₂₂₀K₂₃₃Fe₁₀₀CO₉₆Zr₈₀Zn₇₄U₂₂F₁₂Cl₈N₅O₃Ar₂Xe₂HO₂H₂He₂V) = ∑ Count_i * Weight_i = Count(N) * Weight(N) + Count(B) * Weight(B) + Count(W) * Weight(W) + Count(K) * Weight(K) + Count(Fe) * Weight(Fe) + Count(C) * Weight(C) + Count(O) * Weight(O) + Count(Zr) * Weight(Zr) + Count(Zn) * Weight(Zn) + Count(U) * Weight(U) + Count(F) * Weight(F) + Count(Cl) * Weight(Cl) + Count(Ar) * Weight(Ar) + Count(Xe) * Weight(Xe) + Count(H) * Weight(H) + Count(He) * Weight(He) + Count(V) * Weight(V) = 6 * 14.0067 + 9870 * 10.811 + 1220 * 183.84 + 233 * 39.0983 + 100 * 55.845 + 1 * 12.0107 + 101 * 15.9994 + 80 * 91.224 + 74 * 65.38 + 22 * 238.02891 + 12 * 18.9984032 + 8 * 35.453 + 2 * 39.948 + 2 * 131.293 + 3 * 1.00794 + 2 * 4.002602 + 1 * 50.9415 = 365684.4976 g/mol

Mass percent composition	Atomic percent composition

Formula in Hill system is CH₃Ar₂B₉₈₇₀Cl₈F₁₂Fe₁₀₀He₂K₂₃₃N₆O₁₀₁U₂₂VW₁₂₂₀Xe₂Zn₇₄Zr₈₀

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

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