H256Cl6Cr10O27Na8K12N64F22Hf56Au45La2Lu25At54 molar mass

Molar Mass, Molecular Weight and Elemental Composition Calculator

Molar mass of H₂₅₆Cl₆Cr₁₀O₂₇Na₈K₁₂N₆₄F₂₂Hf₅₆Au₄₅La₂Lu₂₅At₅₄ is 38240.4094 g/mol

Convert between H₂₅₆Cl₆Cr₁₀O₂₇Na₈K₁₂N₆₄F₂₂Hf₅₆Au₄₅La₂Lu₂₅At₅₄ weight and moles

Compound	Moles		Weight, g
H₂₅₆Cl₆Cr₁₀O₂₇Na₈K₁₂N₆₄F₂₂Hf₅₆Au₄₅La₂Lu₂₅At₅₄

Elemental composition of H₂₅₆Cl₆Cr₁₀O₂₇Na₈K₁₂N₆₄F₂₂Hf₅₆Au₄₅La₂Lu₂₅At₅₄

Element	Symbol	Atomic weight	Atoms	Mass percent
Hydrogen	H	1.00794	256	0.6748
Chlorine	Cl	35.453	6	0.5563
Chromium	Cr	51.9961	10	1.3597
Oxygen	O	15.9994	27	1.1297
Sodium	Na	22.98976928	8	0.4810
Potassium	K	39.0983	12	1.2269
Nitrogen	N	14.0067	64	2.3442
Fluorine	F	18.9984032	22	1.0930
Hafnium	Hf	178.49	56	26.1384
Gold	Au	196.966569	45	23.1783
Lanthanum	La	138.90547	2	0.7265
Lutetium	Lu	174.9668	25	11.4386
Astatine	At	209.987148	54	29.6527

Computing molar mass step by step
First, compute the number of each atom in H₂₅₆Cl₆Cr₁₀O₂₇Na₈K₁₂N₆₄F₂₂Hf₅₆Au₄₅La₂Lu₂₅At₅₄: H: 256, Cl: 6, Cr: 10, O: 27, Na: 8, K: 12, N: 64, F: 22, Hf: 56, Au: 45, La: 2, Lu: 25, At: 54 Then, lookup atomic weights for each element in periodic table: H: 1.00794, Cl: 35.453, Cr: 51.9961, O: 15.9994, Na: 22.98976928, K: 39.0983, N: 14.0067, F: 18.9984032, Hf: 178.49, Au: 196.966569, La: 138.90547, Lu: 174.9668, At: 209.987148 Now, compute the sum of products of number of atoms to the atomic weight: Molar mass (H₂₅₆Cl₆Cr₁₀O₂₇Na₈K₁₂N₆₄F₂₂Hf₅₆Au₄₅La₂Lu₂₅At₅₄) = ∑ Count_i * Weight_i = Count(H) * Weight(H) + Count(Cl) * Weight(Cl) + Count(Cr) * Weight(Cr) + Count(O) * Weight(O) + Count(Na) * Weight(Na) + Count(K) * Weight(K) + Count(N) * Weight(N) + Count(F) * Weight(F) + Count(Hf) * Weight(Hf) + Count(Au) * Weight(Au) + Count(La) * Weight(La) + Count(Lu) * Weight(Lu) + Count(At) * Weight(At) = 256 * 1.00794 + 6 * 35.453 + 10 * 51.9961 + 27 * 15.9994 + 8 * 22.98976928 + 12 * 39.0983 + 64 * 14.0067 + 22 * 18.9984032 + 56 * 178.49 + 45 * 196.966569 + 2 * 138.90547 + 25 * 174.9668 + 54 * 209.987148 = 38240.4094 g/mol

Mass percent composition	Atomic percent composition

Formula in Hill system is At₅₄Au₄₅Cl₆Cr₁₀F₂₂H₂₅₆Hf₅₆K₁₂La₂Lu₂₅N₆₄Na₈O₂₇

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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