H1Li1Be1B1C1N1O1F1Ne1He1Na1Mg1Al1Si1P1S1Cl1Ar1K1Ca1Sc molar mass

Molar Mass, Molecular Weight and Elemental Composition Calculator

Molar mass of H₁Li₁Be₁B₁C₁N₁O₁F₁Ne₁He₁Na₁Mg₁Al₁Si₁P₁S₁Cl₁Ar₁K₁Ca₁Sc is 477.9034 g/mol

Convert between H₁Li₁Be₁B₁C₁N₁O₁F₁Ne₁He₁Na₁Mg₁Al₁Si₁P₁S₁Cl₁Ar₁K₁Ca₁Sc weight and moles

Compound	Moles		Weight, g
H₁Li₁Be₁B₁C₁N₁O₁F₁Ne₁He₁Na₁Mg₁Al₁Si₁P₁S₁Cl₁Ar₁K₁Ca₁Sc

Elemental composition of H₁Li₁Be₁B₁C₁N₁O₁F₁Ne₁He₁Na₁Mg₁Al₁Si₁P₁S₁Cl₁Ar₁K₁Ca₁Sc

Element	Symbol	Atomic weight	Atoms	Mass percent
Hydrogen	H	1.00794	1	0.2109
Lithium	Li	6.941	1	1.4524
Beryllium	Be	9.012182	1	1.8858
Boron	B	10.811	1	2.2622
Carbon	C	12.0107	1	2.5132
Nitrogen	N	14.0067	1	2.9309
Oxygen	O	15.9994	1	3.3478
Fluorine	F	18.9984032	1	3.9754
Neon	Ne	20.1797	1	4.2225
Helium	He	4.002602	1	0.8375
Sodium	Na	22.98976928	1	4.8105
Magnesium	Mg	24.3050	1	5.0858
Aluminum	Al	26.9815386	1	5.6458
Silicon	Si	28.0855	1	5.8768
Phosphorus	P	30.973762	1	6.4812
Sulfur	S	32.065	1	6.7095
Chlorine	Cl	35.453	1	7.4184
Argon	Ar	39.948	1	8.3590
Potassium	K	39.0983	1	8.1812
Calcium	Ca	40.078	1	8.3862
Scandium	Sc	44.955912	1	9.4069

Computing molar mass step by step
First, compute the number of each atom in H₁Li₁Be₁B₁C₁N₁O₁F₁Ne₁He₁Na₁Mg₁Al₁Si₁P₁S₁Cl₁Ar₁K₁Ca₁Sc: H: 1, Li: 1, Be: 1, B: 1, C: 1, N: 1, O: 1, F: 1, Ne: 1, He: 1, Na: 1, Mg: 1, Al: 1, Si: 1, P: 1, S: 1, Cl: 1, Ar: 1, K: 1, Ca: 1, Sc: 1 Then, lookup atomic weights for each element in periodic table: H: 1.00794, Li: 6.941, Be: 9.012182, B: 10.811, C: 12.0107, N: 14.0067, O: 15.9994, F: 18.9984032, Ne: 20.1797, He: 4.002602, 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 Now, compute the sum of products of number of atoms to the atomic weight: Molar mass (H₁Li₁Be₁B₁C₁N₁O₁F₁Ne₁He₁Na₁Mg₁Al₁Si₁P₁S₁Cl₁Ar₁K₁Ca₁Sc) = ∑ Count_i * Weight_i = Count(H) * Weight(H) + 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(He) * Weight(He) + 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) = 1 * 1.00794 + 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 * 4.002602 + 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 * 44.955912 = 477.9034 g/mol

Mass percent composition	Atomic percent composition

Formula in Hill system is CHAlArBBeCaClFHeKLiMgNNaNeOPSScSi

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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