SRbCsBrIAsCOClIAtHHeLiBeBCNOFFNeNaMgAlSiPSClArKCa molar mass

Molar Mass, Molecular Weight and Elemental Composition Calculator

Molar mass of SRbCsBrIAsCOClIAtHHeLiBeBCNOFFNeNaMgAlSiPSClArKCa is 1384.4689 g/mol

Convert between SRbCsBrIAsCOClIAtHHeLiBeBCNOFFNeNaMgAlSiPSClArKCa weight and moles

Compound	Moles		Weight, g
SRbCsBrIAsCOClIAtHHeLiBeBCNOFFNeNaMgAlSiPSClArKCa

Elemental composition of SRbCsBrIAsCOClIAtHHeLiBeBCNOFFNeNaMgAlSiPSClArKCa

Element	Symbol	Atomic weight	Atoms	Mass percent
Sulfur	S	32.065	2	4.6321
Rubidium	Rb	85.4678	1	6.1733
Cesium	Cs	132.9054519	1	9.5997
Bromine	Br	79.904	1	5.7715
Iodine	I	126.90447	2	18.3326
Arsenic	As	74.92160	1	5.4116
Carbon	C	12.0107	2	1.7351
Oxygen	O	15.9994	2	2.3113
Chlorine	Cl	35.453	2	5.1215
Astatine	At	209.987148	1	15.1673
Hydrogen	H	1.00794	1	0.0728
Helium	He	4.002602	1	0.2891
Lithium	Li	6.941	1	0.5013
Beryllium	Be	9.012182	1	0.6509
Boron	B	10.811	1	0.7809
Nitrogen	N	14.0067	1	1.0117
Fluorine	F	18.9984032	2	2.7445
Neon	Ne	20.1797	1	1.4576
Sodium	Na	22.98976928	1	1.6605
Magnesium	Mg	24.3050	1	1.7555
Aluminum	Al	26.9815386	1	1.9489
Silicon	Si	28.0855	1	2.0286
Phosphorus	P	30.973762	1	2.2372
Argon	Ar	39.948	1	2.8854
Potassium	K	39.0983	1	2.8241
Calcium	Ca	40.078	1	2.8948

Computing molar mass step by step
First, compute the number of each atom in SRbCsBrIAsCOClIAtHHeLiBeBCNOFFNeNaMgAlSiPSClArKCa: S: 2, Rb: 1, Cs: 1, Br: 1, I: 2, As: 1, C: 2, O: 2, Cl: 2, At: 1, H: 1, He: 1, Li: 1, Be: 1, B: 1, N: 1, F: 2, Ne: 1, Na: 1, Mg: 1, Al: 1, Si: 1, P: 1, Ar: 1, K: 1, Ca: 1 Then, lookup atomic weights for each element in periodic table: S: 32.065, Rb: 85.4678, Cs: 132.9054519, Br: 79.904, I: 126.90447, As: 74.9216, C: 12.0107, O: 15.9994, Cl: 35.453, At: 209.987148, H: 1.00794, He: 4.002602, Li: 6.941, Be: 9.012182, B: 10.811, N: 14.0067, F: 18.9984032, Ne: 20.1797, Na: 22.98976928, Mg: 24.305, Al: 26.9815386, Si: 28.0855, P: 30.973762, Ar: 39.948, K: 39.0983, Ca: 40.078 Now, compute the sum of products of number of atoms to the atomic weight: Molar mass (SRbCsBrIAsCOClIAtHHeLiBeBCNOFFNeNaMgAlSiPSClArKCa) = ∑ Count_i * Weight_i = Count(S) * Weight(S) + Count(Rb) * Weight(Rb) + Count(Cs) * Weight(Cs) + Count(Br) * Weight(Br) + Count(I) * Weight(I) + Count(As) * Weight(As) + Count(C) * Weight(C) + Count(O) * Weight(O) + Count(Cl) * Weight(Cl) + Count(At) * Weight(At) + Count(H) * Weight(H) + Count(He) * Weight(He) + Count(Li) * Weight(Li) + Count(Be) * Weight(Be) + Count(B) * Weight(B) + Count(N) * Weight(N) + 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(P) * Weight(P) + Count(Ar) * Weight(Ar) + Count(K) * Weight(K) + Count(Ca) * Weight(Ca) = 2 * 32.065 + 1 * 85.4678 + 1 * 132.9054519 + 1 * 79.904 + 2 * 126.90447 + 1 * 74.9216 + 2 * 12.0107 + 2 * 15.9994 + 2 * 35.453 + 1 * 209.987148 + 1 * 1.00794 + 1 * 4.002602 + 1 * 6.941 + 1 * 9.012182 + 1 * 10.811 + 1 * 14.0067 + 2 * 18.9984032 + 1 * 20.1797 + 1 * 22.98976928 + 1 * 24.305 + 1 * 26.9815386 + 1 * 28.0855 + 1 * 30.973762 + 1 * 39.948 + 1 * 39.0983 + 1 * 40.078 = 1384.4689 g/mol

Mass percent composition	Atomic percent composition

Formula in Hill system is C₂HAlArAsAtBBeBrCaCl₂CsF₂HeI₂KLiMgNNaNeO₂PRbS₂Si

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