HHeLiBeBCNOFNeNaMgAlSiPSClArKCaNhFlMcLvTsOg molar mass

Molar Mass, Molecular Weight and Elemental Composition Calculator

Molar mass of HHeLiBeBCNOFNeNaMgAlSiPSClArKCaNhFlMcLvTsOg is 1586.7129 g/mol

Convert between HHeLiBeBCNOFNeNaMgAlSiPSClArKCaNhFlMcLvTsOg weight and moles

Compound	Moles		Weight, g
HHeLiBeBCNOFNeNaMgAlSiPSClArKCaNhFlMcLvTsOg

Elemental composition of HHeLiBeBCNOFNeNaMgAlSiPSClArKCaNhFlMcLvTsOg

Element	Symbol	Atomic weight	Atoms	Mass percent
Hydrogen	H	1.00794	1	0.0635
Helium	He	4.002602	1	0.2523
Lithium	Li	6.941	1	0.4374
Beryllium	Be	9.012182	1	0.5680
Boron	B	10.811	1	0.6813
Carbon	C	12.0107	1	0.7570
Nitrogen	N	14.0067	1	0.8827
Oxygen	O	15.9994	1	1.0083
Fluorine	F	18.9984032	1	1.1973
Neon	Ne	20.1797	1	1.2718
Sodium	Na	22.98976928	1	1.4489
Magnesium	Mg	24.3050	1	1.5318
Aluminum	Al	26.9815386	1	1.7005
Silicon	Si	28.0855	1	1.7700
Phosphorus	P	30.973762	1	1.9521
Sulfur	S	32.065	1	2.0208
Chlorine	Cl	35.453	1	2.2344
Argon	Ar	39.948	1	2.5177
Potassium	K	39.0983	1	2.4641
Calcium	Ca	40.078	1	2.5259
Nihonium	Nh	284.1781	1	17.9099
Flerovium	Fl	289.1873	1	18.2256
Moscovium	Mc	288.1925	1	18.1629
Livermorium	Lv	0.0000000	1	0.0000
Tennessine	Ts	292.208	1	18.4159
Oganesson	Og	0.0000000	1	0.0000

Computing molar mass step by step
First, compute the number of each atom in HHeLiBeBCNOFNeNaMgAlSiPSClArKCaNhFlMcLvTsOg: H: 1, He: 1, Li: 1, Be: 1, B: 1, C: 1, N: 1, O: 1, F: 1, Ne: 1, Na: 1, Mg: 1, Al: 1, Si: 1, P: 1, S: 1, Cl: 1, Ar: 1, K: 1, Ca: 1, Nh: 1, Fl: 1, Mc: 1, Lv: 1, Ts: 1, Og: 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, Nh: 284.17808, Fl: 289.18728, Mc: 288.19249, Lv: 0, Ts: 292.20755, Og: 0 Now, compute the sum of products of number of atoms to the atomic weight: Molar mass (HHeLiBeBCNOFNeNaMgAlSiPSClArKCaNhFlMcLvTsOg) = ∑ 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(Nh) * Weight(Nh) + Count(Fl) * Weight(Fl) + Count(Mc) * Weight(Mc) + Count(Lv) * Weight(Lv) + Count(Ts) * Weight(Ts) + Count(Og) * Weight(Og) = 1 * 1.00794 + 1 * 4.002602 + 1 * 6.941 + 1 * 9.012182 + 1 * 10.811 + 1 * 12.0107 + 1 * 14.0067 + 1 * 15.9994 + 1 * 18.9984032 + 1 * 20.1797 + 1 * 22.98976928 + 1 * 24.305 + 1 * 26.9815386 + 1 * 28.0855 + 1 * 30.973762 + 1 * 32.065 + 1 * 35.453 + 1 * 39.948 + 1 * 39.0983 + 1 * 40.078 + 1 * 284.17808 + 1 * 289.18728 + 1 * 288.19249 + 1 * 0 + 1 * 292.20755 + 1 * 0 = 1586.7129 g/mol

Mass percent composition	Atomic percent composition

Formula in Hill system is CHAlArBBeCaClFFlHeKLiLvMcMgNNaNeNhOOgPSSiTs

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

Please let us know how we can improve this web app.

How to cite?

Choose languageDeutschEnglishEspañol Français Italiano Nederlands Polski Português Русский 中文日本語 한국어