Re42H1288O359N83C511S39P28Cs9Br45Cl91Se64I21D239459 molar mass

Molar Mass, Molecular Weight and Elemental Composition Calculator

Molar mass of Re₄₂H₁₂₈₈O₃₅₉N₈₃C₅₁₁S₃₉P₂₈Cs₉Br₄₅Cl₉₁Se₆₄I₂₁D₂₃₉₄₅₉ is 522311.8130 g/mol

Convert between Re₄₂H₁₂₈₈O₃₅₉N₈₃C₅₁₁S₃₉P₂₈Cs₉Br₄₅Cl₉₁Se₆₄I₂₁D₂₃₉₄₅₉ weight and moles

Compound	Moles		Weight, g
Re₄₂H₁₂₈₈O₃₅₉N₈₃C₅₁₁S₃₉P₂₈Cs₉Br₄₅Cl₉₁Se₆₄I₂₁D₂₃₉₄₅₉

Elemental composition of Re₄₂H₁₂₈₈O₃₅₉N₈₃C₅₁₁S₃₉P₂₈Cs₉Br₄₅Cl₉₁Se₆₄I₂₁D₂₃₉₄₅₉

Element	Symbol	Atomic weight	Atoms	Mass percent
Rhenium	Re	186.207	42	1.4973
Hydrogen	H	1.00794	1288	0.2486
Oxygen	O	15.9994	359	1.0997
Nitrogen	N	14.0067	83	0.2226
Carbon	C	12.0107	511	1.1751
Sulfur	S	32.065	39	0.2394
Phosphorus	P	30.973762	28	0.1660
Cesium	Cs	132.9054519	9	0.2290
Bromine	Br	79.904	45	0.6884
Chlorine	Cl	35.453	91	0.6177
Selenium	Se	78.96	64	0.9675
Iodine	I	126.90447	21	0.5102
Hydrogen	D	2.0141017778	239459	92.3385

Computing molar mass step by step
First, compute the number of each atom in Re₄₂H₁₂₈₈O₃₅₉N₈₃C₅₁₁S₃₉P₂₈Cs₉Br₄₅Cl₉₁Se₆₄I₂₁D₂₃₉₄₅₉: Re: 42, H: 1288, O: 359, N: 83, C: 511, S: 39, P: 28, Cs: 9, Br: 45, Cl: 91, Se: 64, I: 21, D: 239459 Then, lookup atomic weights for each element in periodic table: Re: 186.207, H: 1.00794, O: 15.9994, N: 14.0067, C: 12.0107, S: 32.065, P: 30.973762, Cs: 132.9054519, Br: 79.904, Cl: 35.453, Se: 78.96, I: 126.90447, D: 2.0141017778 Now, compute the sum of products of number of atoms to the atomic weight: Molar mass (Re₄₂H₁₂₈₈O₃₅₉N₈₃C₅₁₁S₃₉P₂₈Cs₉Br₄₅Cl₉₁Se₆₄I₂₁D₂₃₉₄₅₉) = ∑ Count_i * Weight_i = Count(Re) * Weight(Re) + Count(H) * Weight(H) + Count(O) * Weight(O) + Count(N) * Weight(N) + Count(C) * Weight(C) + Count(S) * Weight(S) + Count(P) * Weight(P) + Count(Cs) * Weight(Cs) + Count(Br) * Weight(Br) + Count(Cl) * Weight(Cl) + Count(Se) * Weight(Se) + Count(I) * Weight(I) + Count(D) * Weight(D) = 42 * 186.207 + 1288 * 1.00794 + 359 * 15.9994 + 83 * 14.0067 + 511 * 12.0107 + 39 * 32.065 + 28 * 30.973762 + 9 * 132.9054519 + 45 * 79.904 + 91 * 35.453 + 64 * 78.96 + 21 * 126.90447 + 239459 * 2.0141017778 = 522311.8130 g/mol

Mass percent composition	Atomic percent composition

Formula in Hill system is C₅₁₁H₁₂₈₈Br₄₅Cl₉₁Cs₉D₂₃₉₄₅₉I₂₁N₈₃O₃₅₉P₂₈Re₄₂S₃₉Se₆₄

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

Please let us know how we can improve this web app.

How to cite?

Choose languageDeutschEnglishEspañol Français Italiano Nederlands Polski Português Русский 中文日本語 한국어