H81He9Li9Be9B9C9N9O9F9Ne9Na9Mg9Al9Si9P9S9Cl9Ar9K9Ca9Sc9Ti9Cr molar mass

Molar Mass, Molecular Weight and Elemental Composition Calculator

Molar mass of H₈₁He₉Li₉Be₉B₉C₉N₉O₉F₉Ne₉Na₉Mg₉Al₉Si₉P₉S₉Cl₉Ar₉K₉Ca₉Sc₉Ti₉Cr is 4856.5015 g/mol

Convert between H₈₁He₉Li₉Be₉B₉C₉N₉O₉F₉Ne₉Na₉Mg₉Al₉Si₉P₉S₉Cl₉Ar₉K₉Ca₉Sc₉Ti₉Cr weight and moles

Compound	Moles		Weight, g
H₈₁He₉Li₉Be₉B₉C₉N₉O₉F₉Ne₉Na₉Mg₉Al₉Si₉P₉S₉Cl₉Ar₉K₉Ca₉Sc₉Ti₉Cr

Elemental composition of H₈₁He₉Li₉Be₉B₉C₉N₉O₉F₉Ne₉Na₉Mg₉Al₉Si₉P₉S₉Cl₉Ar₉K₉Ca₉Sc₉Ti₉Cr

Element	Symbol	Atomic weight	Atoms	Mass percent
Hydrogen	H	1.00794	81	1.6811
Helium	He	4.002602	9	0.7418
Lithium	Li	6.941	9	1.2863
Beryllium	Be	9.012182	9	1.6701
Boron	B	10.811	9	2.0035
Carbon	C	12.0107	9	2.2258
Nitrogen	N	14.0067	9	2.5957
Oxygen	O	15.9994	9	2.9650
Fluorine	F	18.9984032	9	3.5208
Neon	Ne	20.1797	9	3.7397
Sodium	Na	22.98976928	9	4.2604
Magnesium	Mg	24.3050	9	4.5042
Aluminum	Al	26.9815386	9	5.0002
Silicon	Si	28.0855	9	5.2048
Phosphorus	P	30.973762	9	5.7400
Sulfur	S	32.065	9	5.9422
Chlorine	Cl	35.453	9	6.5701
Argon	Ar	39.948	9	7.4031
Potassium	K	39.0983	9	7.2456
Calcium	Ca	40.078	9	7.4272
Scandium	Sc	44.955912	9	8.3312
Titanium	Ti	47.867	9	8.8706
Chromium	Cr	51.9961	1	1.0706

Computing molar mass step by step
First, compute the number of each atom in H₈₁He₉Li₉Be₉B₉C₉N₉O₉F₉Ne₉Na₉Mg₉Al₉Si₉P₉S₉Cl₉Ar₉K₉Ca₉Sc₉Ti₉Cr: H: 81, He: 9, Li: 9, Be: 9, B: 9, C: 9, N: 9, O: 9, F: 9, Ne: 9, Na: 9, Mg: 9, Al: 9, Si: 9, P: 9, S: 9, Cl: 9, Ar: 9, K: 9, Ca: 9, Sc: 9, Ti: 9, Cr: 1 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, Cl: 35.453, Ar: 39.948, K: 39.0983, Ca: 40.078, Sc: 44.955912, Ti: 47.867, Cr: 51.9961 Now, compute the sum of products of number of atoms to the atomic weight: Molar mass (H₈₁He₉Li₉Be₉B₉C₉N₉O₉F₉Ne₉Na₉Mg₉Al₉Si₉P₉S₉Cl₉Ar₉K₉Ca₉Sc₉Ti₉Cr) = ∑ 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) + Count(Cl) * Weight(Cl) + Count(Ar) * Weight(Ar) + Count(K) * Weight(K) + Count(Ca) * Weight(Ca) + Count(Sc) * Weight(Sc) + Count(Ti) * Weight(Ti) + Count(Cr) * Weight(Cr) = 81 * 1.00794 + 9 * 4.002602 + 9 * 6.941 + 9 * 9.012182 + 9 * 10.811 + 9 * 12.0107 + 9 * 14.0067 + 9 * 15.9994 + 9 * 18.9984032 + 9 * 20.1797 + 9 * 22.98976928 + 9 * 24.305 + 9 * 26.9815386 + 9 * 28.0855 + 9 * 30.973762 + 9 * 32.065 + 9 * 35.453 + 9 * 39.948 + 9 * 39.0983 + 9 * 40.078 + 9 * 44.955912 + 9 * 47.867 + 1 * 51.9961 = 4856.5015 g/mol

Mass percent composition	Atomic percent composition

Formula in Hill system is C₉H₈₁Al₉Ar₉B₉Be₉Ca₉Cl₉CrF₉He₉K₉Li₉Mg₉N₉Na₉Ne₉O₉P₉S₉Sc₉Si₉Ti₉

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, 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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