H1000He250Li148Be110B96C83N71O63F54Ne50Na45Mg41Al38Si35U4 molar mass

Molar Mass, Molecular Weight and Elemental Composition Calculator

Molar mass of H₁₀₀₀He₂₅₀Li₁₄₈Be₁₁₀B₉₆C₈₃N₇₁O₆₃F₅₄Ne₅₀Na₄₅Mg₄₁Al₃₈Si₃₅U₄ is 15090.7305 g/mol

Convert between H₁₀₀₀He₂₅₀Li₁₄₈Be₁₁₀B₉₆C₈₃N₇₁O₆₃F₅₄Ne₅₀Na₄₅Mg₄₁Al₃₈Si₃₅U₄ weight and moles

Compound	Moles		Weight, g
H₁₀₀₀He₂₅₀Li₁₄₈Be₁₁₀B₉₆C₈₃N₇₁O₆₃F₅₄Ne₅₀Na₄₅Mg₄₁Al₃₈Si₃₅U₄

Elemental composition of H₁₀₀₀He₂₅₀Li₁₄₈Be₁₁₀B₉₆C₈₃N₇₁O₆₃F₅₄Ne₅₀Na₄₅Mg₄₁Al₃₈Si₃₅U₄

Element	Symbol	Atomic weight	Atoms	Mass percent
Hydrogen	H	1.00794	1000	6.6792
Helium	He	4.002602	250	6.6309
Lithium	Li	6.941	148	6.8073
Beryllium	Be	9.012182	110	6.5692
Boron	B	10.811	96	6.8774
Carbon	C	12.0107	83	6.6060
Nitrogen	N	14.0067	71	6.5900
Oxygen	O	15.9994	63	6.6793
Fluorine	F	18.9984032	54	6.7983
Neon	Ne	20.1797	50	6.6861
Sodium	Na	22.98976928	45	6.8555
Magnesium	Mg	24.3050	41	6.6034
Aluminum	Al	26.9815386	38	6.7942
Silicon	Si	28.0855	35	6.5139
Uranium	U	238.02891	4	6.3093

Computing molar mass step by step
First, compute the number of each atom in H₁₀₀₀He₂₅₀Li₁₄₈Be₁₁₀B₉₆C₈₃N₇₁O₆₃F₅₄Ne₅₀Na₄₅Mg₄₁Al₃₈Si₃₅U₄: H: 1000, He: 250, Li: 148, Be: 110, B: 96, C: 83, N: 71, O: 63, F: 54, Ne: 50, Na: 45, Mg: 41, Al: 38, Si: 35, U: 4 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, U: 238.02891 Now, compute the sum of products of number of atoms to the atomic weight: Molar mass (H₁₀₀₀He₂₅₀Li₁₄₈Be₁₁₀B₉₆C₈₃N₇₁O₆₃F₅₄Ne₅₀Na₄₅Mg₄₁Al₃₈Si₃₅U₄) = ∑ 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(U) * Weight(U) = 1000 * 1.00794 + 250 * 4.002602 + 148 * 6.941 + 110 * 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 + 4 * 238.02891 = 15090.7305 g/mol

Mass percent composition	Atomic percent composition

Formula in Hill system is C₈₃H₁₀₀₀Al₃₈B₉₆Be₁₁₀F₅₄He₂₅₀Li₁₄₈Mg₄₁N₇₁Na₄₅Ne₅₀O₆₃Si₃₅U₄

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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