H8He12Li2Be6B5C12N7O9F10F9Ne8Na4Mg3Al15Si12PS5 molar mass

Molar Mass, Molecular Weight and Elemental Composition Calculator

Molar mass of H₈He₁₂Li₂Be₆B₅C₁₂N₇O₉F₁₀F₉Ne₈Na₄Mg₃Al₁₅Si₁₂PS₅ is 2184.6039 g/mol

Convert between H₈He₁₂Li₂Be₆B₅C₁₂N₇O₉F₁₀F₉Ne₈Na₄Mg₃Al₁₅Si₁₂PS₅ weight and moles

Compound	Moles		Weight, g
H₈He₁₂Li₂Be₆B₅C₁₂N₇O₉F₁₀F₉Ne₈Na₄Mg₃Al₁₅Si₁₂PS₅

Elemental composition of H₈He₁₂Li₂Be₆B₅C₁₂N₇O₉F₁₀F₉Ne₈Na₄Mg₃Al₁₅Si₁₂PS₅

Element	Symbol	Atomic weight	Atoms	Mass percent
Hydrogen	H	1.00794	8	0.3691
Helium	He	4.002602	12	2.1986
Lithium	Li	6.941	2	0.6354
Beryllium	Be	9.012182	6	2.4752
Boron	B	10.811	5	2.4744
Carbon	C	12.0107	12	6.5975
Nitrogen	N	14.0067	7	4.4881
Oxygen	O	15.9994	9	6.5913
Fluorine	F	18.9984032	19	16.5233
Neon	Ne	20.1797	8	7.3898
Sodium	Na	22.98976928	4	4.2094
Magnesium	Mg	24.3050	3	3.3377
Aluminum	Al	26.9815386	15	18.5262
Silicon	Si	28.0855	12	15.4273
Phosphorus	P	30.973762	1	1.4178
Sulfur	S	32.065	5	7.3389

Computing molar mass step by step
First, compute the number of each atom in H₈He₁₂Li₂Be₆B₅C₁₂N₇O₉F₁₀F₉Ne₈Na₄Mg₃Al₁₅Si₁₂PS₅: H: 8, He: 12, Li: 2, Be: 6, B: 5, C: 12, N: 7, O: 9, F: 19, Ne: 8, Na: 4, Mg: 3, Al: 15, Si: 12, P: 1, S: 5 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, Mg: 24.305, Al: 26.9815386, Si: 28.0855, P: 30.973762, S: 32.065 Now, compute the sum of products of number of atoms to the atomic weight: Molar mass (H₈He₁₂Li₂Be₆B₅C₁₂N₇O₉F₁₀F₉Ne₈Na₄Mg₃Al₁₅Si₁₂PS₅) = ∑ 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(Mg) * Weight(Mg) + Count(Al) * Weight(Al) + Count(Si) * Weight(Si) + Count(P) * Weight(P) + Count(S) * Weight(S) = 8 * 1.00794 + 12 * 4.002602 + 2 * 6.941 + 6 * 9.012182 + 5 * 10.811 + 12 * 12.0107 + 7 * 14.0067 + 9 * 15.9994 + 19 * 18.9984032 + 8 * 20.1797 + 4 * 22.98976928 + 3 * 24.305 + 15 * 26.9815386 + 12 * 28.0855 + 1 * 30.973762 + 5 * 32.065 = 2184.6039 g/mol

Mass percent composition	Atomic percent composition

Formula in Hill system is C₁₂H₈Al₁₅B₅Be₆F₁₉He₁₂Li₂Mg₃N₇Na₄Ne₈O₉PS₅Si₁₂

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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