H916O55S55N454Cl555I88F170Mn154Fe4554Cu455He4544W444Cr555V45 molar mass

Molar Mass, Molecular Weight and Elemental Composition Calculator

Molar mass of H₉₁₆O₅₅S₅₅N₄₅₄Cl₅₅₅I₈₈F₁₇₀Mn₁₅₄Fe₄₅₅₄Cu₄₅₅He₄₅₄₄W₄₄₄Cr₅₅₅V₄₅ is 466654.5992 g/mol

Convert between H₉₁₆O₅₅S₅₅N₄₅₄Cl₅₅₅I₈₈F₁₇₀Mn₁₅₄Fe₄₅₅₄Cu₄₅₅He₄₅₄₄W₄₄₄Cr₅₅₅V₄₅ weight and moles

Compound	Moles		Weight, g
H₉₁₆O₅₅S₅₅N₄₅₄Cl₅₅₅I₈₈F₁₇₀Mn₁₅₄Fe₄₅₅₄Cu₄₅₅He₄₅₄₄W₄₄₄Cr₅₅₅V₄₅

Elemental composition of H₉₁₆O₅₅S₅₅N₄₅₄Cl₅₅₅I₈₈F₁₇₀Mn₁₅₄Fe₄₅₅₄Cu₄₅₅He₄₅₄₄W₄₄₄Cr₅₅₅V₄₅

Element	Symbol	Atomic weight	Atoms	Mass percent
Hydrogen	H	1.00794	916	0.1978
Oxygen	O	15.9994	55	0.1886
Sulfur	S	32.065	55	0.3779
Nitrogen	N	14.0067	454	1.3627
Chlorine	Cl	35.453	555	4.2165
Iodine	I	126.90447	88	2.3931
Fluorine	F	18.9984032	170	0.6921
Manganese	Mn	54.938045	154	1.8130
Iron	Fe	55.845	4554	54.4982
Copper	Cu	63.546	455	6.1959
Helium	He	4.002602	4544	3.8975
Tungsten	W	183.84	444	17.4915
Chromium	Cr	51.9961	555	6.1840
Vanadium	V	50.9415	45	0.4912

Computing molar mass step by step
First, compute the number of each atom in H₉₁₆O₅₅S₅₅N₄₅₄Cl₅₅₅I₈₈F₁₇₀Mn₁₅₄Fe₄₅₅₄Cu₄₅₅He₄₅₄₄W₄₄₄Cr₅₅₅V₄₅: H: 916, O: 55, S: 55, N: 454, Cl: 555, I: 88, F: 170, Mn: 154, Fe: 4554, Cu: 455, He: 4544, W: 444, Cr: 555, V: 45 Then, lookup atomic weights for each element in periodic table: H: 1.00794, O: 15.9994, S: 32.065, N: 14.0067, Cl: 35.453, I: 126.90447, F: 18.9984032, Mn: 54.938045, Fe: 55.845, Cu: 63.546, He: 4.002602, W: 183.84, Cr: 51.9961, V: 50.9415 Now, compute the sum of products of number of atoms to the atomic weight: Molar mass (H₉₁₆O₅₅S₅₅N₄₅₄Cl₅₅₅I₈₈F₁₇₀Mn₁₅₄Fe₄₅₅₄Cu₄₅₅He₄₅₄₄W₄₄₄Cr₅₅₅V₄₅) = ∑ Count_i * Weight_i = Count(H) * Weight(H) + Count(O) * Weight(O) + Count(S) * Weight(S) + Count(N) * Weight(N) + Count(Cl) * Weight(Cl) + Count(I) * Weight(I) + Count(F) * Weight(F) + Count(Mn) * Weight(Mn) + Count(Fe) * Weight(Fe) + Count(Cu) * Weight(Cu) + Count(He) * Weight(He) + Count(W) * Weight(W) + Count(Cr) * Weight(Cr) + Count(V) * Weight(V) = 916 * 1.00794 + 55 * 15.9994 + 55 * 32.065 + 454 * 14.0067 + 555 * 35.453 + 88 * 126.90447 + 170 * 18.9984032 + 154 * 54.938045 + 4554 * 55.845 + 455 * 63.546 + 4544 * 4.002602 + 444 * 183.84 + 555 * 51.9961 + 45 * 50.9415 = 466654.5992 g/mol

Mass percent composition	Atomic percent composition

Formula in Hill system is Cl₅₅₅Cr₅₅₅Cu₄₅₅F₁₇₀Fe₄₅₅₄H₉₁₆He₄₅₄₄I₈₈Mn₁₅₄N₄₅₄O₅₅S₅₅V₄₅W₄₄₄

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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