H82He81Li80Be8B7C6N5O4F3Ne2Na10W3F4Ra3W3D4Ge4Ga5Mg6Al6Si4 molar mass

Molar Mass, Molecular Weight and Elemental Composition Calculator

Molar mass of H₈₂He₈₁Li₈₀Be₈B₇C₆N₅O₄F₃Ne₂Na₁₀W₃F₄Ra₃W₃D₄Ge₄Ga₅Mg₆Al₆Si₄ is 4567.6664 g/mol

Convert between H₈₂He₈₁Li₈₀Be₈B₇C₆N₅O₄F₃Ne₂Na₁₀W₃F₄Ra₃W₃D₄Ge₄Ga₅Mg₆Al₆Si₄ weight and moles

Compound	Moles		Weight, g
H₈₂He₈₁Li₈₀Be₈B₇C₆N₅O₄F₃Ne₂Na₁₀W₃F₄Ra₃W₃D₄Ge₄Ga₅Mg₆Al₆Si₄

Elemental composition of H₈₂He₈₁Li₈₀Be₈B₇C₆N₅O₄F₃Ne₂Na₁₀W₃F₄Ra₃W₃D₄Ge₄Ga₅Mg₆Al₆Si₄

Element	Symbol	Atomic weight	Atoms	Mass percent
Hydrogen	H	1.00794	82	1.8095
Helium	He	4.002602	81	7.0980
Lithium	Li	6.941	80	12.1568
Beryllium	Be	9.012182	8	1.5784
Boron	B	10.811	7	1.6568
Carbon	C	12.0107	6	1.5777
Nitrogen	N	14.0067	5	1.5332
Oxygen	O	15.9994	4	1.4011
Fluorine	F	18.9984032	7	2.9115
Neon	Ne	20.1797	2	0.8836
Sodium	Na	22.98976928	10	5.0332
Tungsten	W	183.84	6	24.1489
Radium	Ra	226.025410	3	14.8451
Germanium	Ge	72.64	4	6.3612
Gallium	Ga	69.723	5	7.6322
Magnesium	Mg	24.3050	6	3.1927
Aluminum	Al	26.9815386	6	3.5442
Silicon	Si	28.0855	4	2.4595
Hydrogen	D	2.0141017778	4	0.1764

Computing molar mass step by step
First, compute the number of each atom in H₈₂He₈₁Li₈₀Be₈B₇C₆N₅O₄F₃Ne₂Na₁₀W₃F₄Ra₃W₃D₄Ge₄Ga₅Mg₆Al₆Si₄: H: 82, He: 81, Li: 80, Be: 8, B: 7, C: 6, N: 5, O: 4, F: 7, Ne: 2, Na: 10, W: 6, Ra: 3, Ge: 4, Ga: 5, Mg: 6, Al: 6, Si: 4, D: 4 Then, lookup atomic weights for each element in periodic table: H: 1.00794, He: 4.002602, Li: 6.941, Be: 9.012182, B: 10.811, C: 12.0107, N: 14.0067, O: 15.9994, F: 18.9984032, Ne: 20.1797, Na: 22.98976928, W: 183.84, Ra: 226.0254098, Ge: 72.64, Ga: 69.723, Mg: 24.305, Al: 26.9815386, Si: 28.0855, D: 2.0141017778 Now, compute the sum of products of number of atoms to the atomic weight: Molar mass (H₈₂He₈₁Li₈₀Be₈B₇C₆N₅O₄F₃Ne₂Na₁₀W₃F₄Ra₃W₃D₄Ge₄Ga₅Mg₆Al₆Si₄) = ∑ Count_i * Weight_i = Count(H) * Weight(H) + Count(He) * Weight(He) + Count(Li) * Weight(Li) + Count(Be) * Weight(Be) + Count(B) * Weight(B) + Count(C) * Weight(C) + Count(N) * Weight(N) + Count(O) * Weight(O) + Count(F) * Weight(F) + Count(Ne) * Weight(Ne) + Count(Na) * Weight(Na) + Count(W) * Weight(W) + Count(Ra) * Weight(Ra) + Count(Ge) * Weight(Ge) + Count(Ga) * Weight(Ga) + Count(Mg) * Weight(Mg) + Count(Al) * Weight(Al) + Count(Si) * Weight(Si) + Count(D) * Weight(D) = 82 * 1.00794 + 81 * 4.002602 + 80 * 6.941 + 8 * 9.012182 + 7 * 10.811 + 6 * 12.0107 + 5 * 14.0067 + 4 * 15.9994 + 7 * 18.9984032 + 2 * 20.1797 + 10 * 22.98976928 + 6 * 183.84 + 3 * 226.0254098 + 4 * 72.64 + 5 * 69.723 + 6 * 24.305 + 6 * 26.9815386 + 4 * 28.0855 + 4 * 2.0141017778 = 4567.6664 g/mol

Mass percent composition	Atomic percent composition

Formula in Hill system is C₆H₈₂Al₆B₇Be₈F₇Ga₅Ge₄D₄He₈₁Li₈₀Mg₆N₅Na₁₀Ne₂O₄Ra₃Si₄W₆

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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