H2Li2Na2K2Rb2Cs2Fr2Be2Mg2Ca2Sr2Ba2Ra2Sc2Y2La2Ac2Ti2Zr2Hf2Rf2 molar mass

Molar Mass, Molecular Weight and Elemental Composition Calculator

Molar mass of H₂Li₂Na₂K₂Rb₂Cs₂Fr₂Be₂Mg₂Ca₂Sr₂Ba₂Ra₂Sc₂Y₂La₂Ac₂Ti₂Zr₂Hf₂Rf₂ is 4236.5805 g/mol

Convert between H₂Li₂Na₂K₂Rb₂Cs₂Fr₂Be₂Mg₂Ca₂Sr₂Ba₂Ra₂Sc₂Y₂La₂Ac₂Ti₂Zr₂Hf₂Rf₂ weight and moles

Compound	Moles		Weight, g
H₂Li₂Na₂K₂Rb₂Cs₂Fr₂Be₂Mg₂Ca₂Sr₂Ba₂Ra₂Sc₂Y₂La₂Ac₂Ti₂Zr₂Hf₂Rf₂

Elemental composition of H₂Li₂Na₂K₂Rb₂Cs₂Fr₂Be₂Mg₂Ca₂Sr₂Ba₂Ra₂Sc₂Y₂La₂Ac₂Ti₂Zr₂Hf₂Rf₂

Element	Symbol	Atomic weight	Atoms	Mass percent
Hydrogen	H	1.00794	2	0.0476
Lithium	Li	6.941	2	0.3277
Sodium	Na	22.98976928	2	1.0853
Potassium	K	39.0983	2	1.8457
Rubidium	Rb	85.4678	2	4.0348
Cesium	Cs	132.9054519	2	6.2742
Francium	Fr	223.019736	2	10.5283
Beryllium	Be	9.012182	2	0.4254
Magnesium	Mg	24.3050	2	1.1474
Calcium	Ca	40.078	2	1.8920
Strontium	Sr	87.62	2	4.1364
Barium	Ba	137.327	2	6.4829
Radium	Ra	226.025410	2	10.6702
Scandium	Sc	44.955912	2	2.1223
Yttrium	Y	88.90585	2	4.1971
Lanthanum	La	138.90547	2	6.5574
Actinium	Ac	227.027752	2	10.7175
Titanium	Ti	47.867	2	2.2597
Zirconium	Zr	91.224	2	4.3065
Hafnium	Hf	178.49	2	8.4261
Rutherfordium	Rf	265.1167	2	12.5156

Computing molar mass step by step
First, compute the number of each atom in H₂Li₂Na₂K₂Rb₂Cs₂Fr₂Be₂Mg₂Ca₂Sr₂Ba₂Ra₂Sc₂Y₂La₂Ac₂Ti₂Zr₂Hf₂Rf₂: H: 2, Li: 2, Na: 2, K: 2, Rb: 2, Cs: 2, Fr: 2, Be: 2, Mg: 2, Ca: 2, Sr: 2, Ba: 2, Ra: 2, Sc: 2, Y: 2, La: 2, Ac: 2, Ti: 2, Zr: 2, Hf: 2, Rf: 2 Then, lookup atomic weights for each element in periodic table: H: 1.00794, Li: 6.941, Na: 22.98976928, K: 39.0983, Rb: 85.4678, Cs: 132.9054519, Fr: 223.0197359, Be: 9.012182, Mg: 24.305, Ca: 40.078, Sr: 87.62, Ba: 137.327, Ra: 226.0254098, Sc: 44.955912, Y: 88.90585, La: 138.90547, Ac: 227.0277521, Ti: 47.867, Zr: 91.224, Hf: 178.49, Rf: 265.1167 Now, compute the sum of products of number of atoms to the atomic weight: Molar mass (H₂Li₂Na₂K₂Rb₂Cs₂Fr₂Be₂Mg₂Ca₂Sr₂Ba₂Ra₂Sc₂Y₂La₂Ac₂Ti₂Zr₂Hf₂Rf₂) = ∑ Count_i * Weight_i = Count(H) * Weight(H) + Count(Li) * Weight(Li) + Count(Na) * Weight(Na) + Count(K) * Weight(K) + Count(Rb) * Weight(Rb) + Count(Cs) * Weight(Cs) + Count(Fr) * Weight(Fr) + Count(Be) * Weight(Be) + Count(Mg) * Weight(Mg) + Count(Ca) * Weight(Ca) + Count(Sr) * Weight(Sr) + Count(Ba) * Weight(Ba) + Count(Ra) * Weight(Ra) + Count(Sc) * Weight(Sc) + Count(Y) * Weight(Y) + Count(La) * Weight(La) + Count(Ac) * Weight(Ac) + Count(Ti) * Weight(Ti) + Count(Zr) * Weight(Zr) + Count(Hf) * Weight(Hf) + Count(Rf) * Weight(Rf) = 2 * 1.00794 + 2 * 6.941 + 2 * 22.98976928 + 2 * 39.0983 + 2 * 85.4678 + 2 * 132.9054519 + 2 * 223.0197359 + 2 * 9.012182 + 2 * 24.305 + 2 * 40.078 + 2 * 87.62 + 2 * 137.327 + 2 * 226.0254098 + 2 * 44.955912 + 2 * 88.90585 + 2 * 138.90547 + 2 * 227.0277521 + 2 * 47.867 + 2 * 91.224 + 2 * 178.49 + 2 * 265.1167 = 4236.5805 g/mol

Mass percent composition	Atomic percent composition

Formula in Hill system is Ac₂Ba₂Be₂Ca₂Cs₂Fr₂H₂Hf₂K₂La₂Li₂Mg₂Na₂Ra₂Rb₂Rf₂Sc₂Sr₂Ti₂Y₂Zr₂

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