H1000He250Li155Be120B96C83N71O63F54Ne50Na45Mg41Al38Si35P33 molar mass

Molar Mass, Molecular Weight and Elemental Composition Calculator

Molar mass of H₁₀₀₀He₂₅₀Li₁₅₅Be₁₂₀B₉₆C₈₃N₇₁O₆₃F₅₄Ne₅₀Na₄₅Mg₄₁Al₃₈Si₃₅P₃₃ is 15299.4578 g/mol

Convert between H₁₀₀₀He₂₅₀Li₁₅₅Be₁₂₀B₉₆C₈₃N₇₁O₆₃F₅₄Ne₅₀Na₄₅Mg₄₁Al₃₈Si₃₅P₃₃ weight and moles

Compound	Moles		Weight, g
H₁₀₀₀He₂₅₀Li₁₅₅Be₁₂₀B₉₆C₈₃N₇₁O₆₃F₅₄Ne₅₀Na₄₅Mg₄₁Al₃₈Si₃₅P₃₃

Elemental composition of H₁₀₀₀He₂₅₀Li₁₅₅Be₁₂₀B₉₆C₈₃N₇₁O₆₃F₅₄Ne₅₀Na₄₅Mg₄₁Al₃₈Si₃₅P₃₃

Element	Symbol	Atomic weight	Atoms	Mass percent
Hydrogen	H	1.00794	1000	6.5881
Helium	He	4.002602	250	6.5404
Lithium	Li	6.941	155	7.0320
Beryllium	Be	9.012182	120	7.0686
Boron	B	10.811	96	6.7836
Carbon	C	12.0107	83	6.5158
Nitrogen	N	14.0067	71	6.5001
Oxygen	O	15.9994	63	6.5882
Fluorine	F	18.9984032	54	6.7056
Neon	Ne	20.1797	50	6.5949
Sodium	Na	22.98976928	45	6.7619
Magnesium	Mg	24.3050	41	6.5133
Aluminum	Al	26.9815386	38	6.7015
Silicon	Si	28.0855	35	6.4250
Phosphorus	P	30.973762	33	6.6809

Computing molar mass step by step
First, compute the number of each atom in H₁₀₀₀He₂₅₀Li₁₅₅Be₁₂₀B₉₆C₈₃N₇₁O₆₃F₅₄Ne₅₀Na₄₅Mg₄₁Al₃₈Si₃₅P₃₃: H: 1000, He: 250, Li: 155, Be: 120, B: 96, C: 83, N: 71, O: 63, F: 54, Ne: 50, Na: 45, Mg: 41, Al: 38, Si: 35, P: 33 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 Now, compute the sum of products of number of atoms to the atomic weight: Molar mass (H₁₀₀₀He₂₅₀Li₁₅₅Be₁₂₀B₉₆C₈₃N₇₁O₆₃F₅₄Ne₅₀Na₄₅Mg₄₁Al₃₈Si₃₅P₃₃) = ∑ 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) = 1000 * 1.00794 + 250 * 4.002602 + 155 * 6.941 + 120 * 9.012182 + 96 * 10.811 + 83 * 12.0107 + 71 * 14.0067 + 63 * 15.9994 + 54 * 18.9984032 + 50 * 20.1797 + 45 * 22.98976928 + 41 * 24.305 + 38 * 26.9815386 + 35 * 28.0855 + 33 * 30.973762 = 15299.4578 g/mol

Mass percent composition	Atomic percent composition

Formula in Hill system is C₈₃H₁₀₀₀Al₃₈B₉₆Be₁₂₀F₅₄He₂₅₀Li₁₅₅Mg₄₁N₇₁Na₄₅Ne₅₀O₆₃P₃₃Si₃₅

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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