H3O8NI56C34Fe37O51Ca20Ra3Xe45Ne83He4Kr83Ar53Rn27 molar mass

Molar Mass, Molecular Weight and Elemental Composition Calculator

Molar mass of H₃O₈NI₅₆C₃₄Fe₃₇O₅₁Ca₂₀Ra₃Xe₄₅Ne₈₃He₄Kr₈₃Ar₅₃Rn₂₇ is 34390.2452 g/mol

Convert between H₃O₈NI₅₆C₃₄Fe₃₇O₅₁Ca₂₀Ra₃Xe₄₅Ne₈₃He₄Kr₈₃Ar₅₃Rn₂₇ weight and moles

Compound	Moles		Weight, g
H₃O₈NI₅₆C₃₄Fe₃₇O₅₁Ca₂₀Ra₃Xe₄₅Ne₈₃He₄Kr₈₃Ar₅₃Rn₂₇

Elemental composition of H₃O₈NI₅₆C₃₄Fe₃₇O₅₁Ca₂₀Ra₃Xe₄₅Ne₈₃He₄Kr₈₃Ar₅₃Rn₂₇

Element	Symbol	Atomic weight	Atoms	Mass percent
Hydrogen	H	1.00794	3	0.0088
Oxygen	O	15.9994	59	2.7449
Nitrogen	N	14.0067	1	0.0407
Iodine	I	126.90447	56	20.6647
Carbon	C	12.0107	34	1.1874
Iron	Fe	55.845	37	6.0083
Calcium	Ca	40.078	20	2.3308
Radium	Ra	226.025410	3	1.9717
Xenon	Xe	131.293	45	17.1798
Neon	Ne	20.1797	83	4.8703
Helium	He	4.002602	4	0.0466
Krypton	Kr	83.798	83	20.2244
Argon	Ar	39.948	53	6.1565
Radon	Rn	210.990601	27	16.5650

Computing molar mass step by step
First, compute the number of each atom in H₃O₈NI₅₆C₃₄Fe₃₇O₅₁Ca₂₀Ra₃Xe₄₅Ne₈₃He₄Kr₈₃Ar₅₃Rn₂₇: H: 3, O: 59, N: 1, I: 56, C: 34, Fe: 37, Ca: 20, Ra: 3, Xe: 45, Ne: 83, He: 4, Kr: 83, Ar: 53, Rn: 27 Then, lookup atomic weights for each element in periodic table: H: 1.00794, O: 15.9994, N: 14.0067, I: 126.90447, C: 12.0107, Fe: 55.845, Ca: 40.078, Ra: 226.0254098, Xe: 131.293, Ne: 20.1797, He: 4.002602, Kr: 83.798, Ar: 39.948, Rn: 210.990601 Now, compute the sum of products of number of atoms to the atomic weight: Molar mass (H₃O₈NI₅₆C₃₄Fe₃₇O₅₁Ca₂₀Ra₃Xe₄₅Ne₈₃He₄Kr₈₃Ar₅₃Rn₂₇) = ∑ Count_i * Weight_i = Count(H) * Weight(H) + Count(O) * Weight(O) + Count(N) * Weight(N) + Count(I) * Weight(I) + Count(C) * Weight(C) + Count(Fe) * Weight(Fe) + Count(Ca) * Weight(Ca) + Count(Ra) * Weight(Ra) + Count(Xe) * Weight(Xe) + Count(Ne) * Weight(Ne) + Count(He) * Weight(He) + Count(Kr) * Weight(Kr) + Count(Ar) * Weight(Ar) + Count(Rn) * Weight(Rn) = 3 * 1.00794 + 59 * 15.9994 + 1 * 14.0067 + 56 * 126.90447 + 34 * 12.0107 + 37 * 55.845 + 20 * 40.078 + 3 * 226.0254098 + 45 * 131.293 + 83 * 20.1797 + 4 * 4.002602 + 83 * 83.798 + 53 * 39.948 + 27 * 210.990601 = 34390.2452 g/mol

Mass percent composition	Atomic percent composition

Formula in Hill system is C₃₄H₃Ar₅₃Ca₂₀Fe₃₇He₄I₅₆Kr₈₃NNe₈₃O₅₉Ra₃Rn₂₇Xe₄₅

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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