H8He6Li8BeC7B7N3Ne6K5Na4AuSe4Zn8Cu8Al9Lu7Hf6Ta4W7Re9Os7No9Tm molar mass

Molar Mass, Molecular Weight and Elemental Composition Calculator

Molar mass of H₈He₆Li₈BeC₇B₇N₃Ne₆K₅Na₄AuSe₄Zn₈Cu₈Al₉Lu₇Hf₆Ta₄W₇Re₉Os₇No₉Tm is 12308.6641 g/mol

Convert between H₈He₆Li₈BeC₇B₇N₃Ne₆K₅Na₄AuSe₄Zn₈Cu₈Al₉Lu₇Hf₆Ta₄W₇Re₉Os₇No₉Tm weight and moles

Compound	Moles		Weight, g
H₈He₆Li₈BeC₇B₇N₃Ne₆K₅Na₄AuSe₄Zn₈Cu₈Al₉Lu₇Hf₆Ta₄W₇Re₉Os₇No₉Tm

Elemental composition of H₈He₆Li₈BeC₇B₇N₃Ne₆K₅Na₄AuSe₄Zn₈Cu₈Al₉Lu₇Hf₆Ta₄W₇Re₉Os₇No₉Tm

Element	Symbol	Atomic weight	Atoms	Mass percent
Hydrogen	H	1.00794	8	0.0655
Helium	He	4.002602	6	0.1951
Lithium	Li	6.941	8	0.4511
Beryllium	Be	9.012182	1	0.0732
Carbon	C	12.0107	7	0.6831
Boron	B	10.811	7	0.6148
Nitrogen	N	14.0067	3	0.3414
Neon	Ne	20.1797	6	0.9837
Potassium	K	39.0983	5	1.5882
Sodium	Na	22.98976928	4	0.7471
Gold	Au	196.966569	1	1.6002
Selenium	Se	78.96	4	2.5660
Zinc	Zn	65.38	8	4.2494
Copper	Cu	63.546	8	4.1302
Aluminum	Al	26.9815386	9	1.9729
Lutetium	Lu	174.9668	7	9.9505
Hafnium	Hf	178.49	6	8.7007
Tantalum	Ta	180.94788	4	5.8803
Tungsten	W	183.84	7	10.4551
Rhenium	Re	186.207	9	13.6153
Osmium	Os	190.23	7	10.8185
Nobelium	No	259.1010	9	18.9453
Thulium	Tm	168.93421	1	1.3725

Computing molar mass step by step
First, compute the number of each atom in H₈He₆Li₈BeC₇B₇N₃Ne₆K₅Na₄AuSe₄Zn₈Cu₈Al₉Lu₇Hf₆Ta₄W₇Re₉Os₇No₉Tm: H: 8, He: 6, Li: 8, Be: 1, C: 7, B: 7, N: 3, Ne: 6, K: 5, Na: 4, Au: 1, Se: 4, Zn: 8, Cu: 8, Al: 9, Lu: 7, Hf: 6, Ta: 4, W: 7, Re: 9, Os: 7, No: 9, Tm: 1 Then, lookup atomic weights for each element in periodic table: H: 1.00794, He: 4.002602, Li: 6.941, Be: 9.012182, C: 12.0107, B: 10.811, N: 14.0067, Ne: 20.1797, K: 39.0983, Na: 22.98976928, Au: 196.966569, Se: 78.96, Zn: 65.38, Cu: 63.546, Al: 26.9815386, Lu: 174.9668, Hf: 178.49, Ta: 180.94788, W: 183.84, Re: 186.207, Os: 190.23, No: 259.10103, Tm: 168.93421 Now, compute the sum of products of number of atoms to the atomic weight: Molar mass (H₈He₆Li₈BeC₇B₇N₃Ne₆K₅Na₄AuSe₄Zn₈Cu₈Al₉Lu₇Hf₆Ta₄W₇Re₉Os₇No₉Tm) = ∑ Count_i * Weight_i = Count(H) * Weight(H) + Count(He) * Weight(He) + Count(Li) * Weight(Li) + Count(Be) * Weight(Be) + Count(C) * Weight(C) + Count(B) * Weight(B) + Count(N) * Weight(N) + Count(Ne) * Weight(Ne) + Count(K) * Weight(K) + Count(Na) * Weight(Na) + Count(Au) * Weight(Au) + Count(Se) * Weight(Se) + Count(Zn) * Weight(Zn) + Count(Cu) * Weight(Cu) + Count(Al) * Weight(Al) + Count(Lu) * Weight(Lu) + Count(Hf) * Weight(Hf) + Count(Ta) * Weight(Ta) + Count(W) * Weight(W) + Count(Re) * Weight(Re) + Count(Os) * Weight(Os) + Count(No) * Weight(No) + Count(Tm) * Weight(Tm) = 8 * 1.00794 + 6 * 4.002602 + 8 * 6.941 + 1 * 9.012182 + 7 * 12.0107 + 7 * 10.811 + 3 * 14.0067 + 6 * 20.1797 + 5 * 39.0983 + 4 * 22.98976928 + 1 * 196.966569 + 4 * 78.96 + 8 * 65.38 + 8 * 63.546 + 9 * 26.9815386 + 7 * 174.9668 + 6 * 178.49 + 4 * 180.94788 + 7 * 183.84 + 9 * 186.207 + 7 * 190.23 + 9 * 259.10103 + 1 * 168.93421 = 12308.6641 g/mol

Mass percent composition	Atomic percent composition

Formula in Hill system is C₇H₈Al₉AuB₇BeCu₈He₆Hf₆K₅Li₈Lu₇N₃Na₄Ne₆No₉Os₇Re₉Se₄Ta₄TmW₇Zn₈

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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