H2SiF6Mg9Pr5O999999Se2S3Ag3Cl9CNU65N45Ca25Sn25Hs108Mt9999 molar mass

Molar Mass, Molecular Weight and Elemental Composition Calculator

Molar mass of H₂SiF₆Mg₉Pr₅O₉₉₉₉₉₉Se₂S₃Ag₃Cl₉CNU₆₅N₄₅Ca₂₅Sn₂₅Hs₁₀₈Mt₉₉₉₉ is 18811856.0613 g/mol

Convert between H₂SiF₆Mg₉Pr₅O₉₉₉₉₉₉Se₂S₃Ag₃Cl₉CNU₆₅N₄₅Ca₂₅Sn₂₅Hs₁₀₈Mt₉₉₉₉ weight and moles

Compound	Moles		Weight, g
H₂SiF₆Mg₉Pr₅O₉₉₉₉₉₉Se₂S₃Ag₃Cl₉CNU₆₅N₄₅Ca₂₅Sn₂₅Hs₁₀₈Mt₉₉₉₉

Elemental composition of H₂SiF₆Mg₉Pr₅O₉₉₉₉₉₉Se₂S₃Ag₃Cl₉CNU₆₅N₄₅Ca₂₅Sn₂₅Hs₁₀₈Mt₉₉₉₉

Element	Symbol	Atomic weight	Atoms	Mass percent
Hydrogen	H	1.00794	2	0.0000
Silicon	Si	28.0855	1	0.0001
Fluorine	F	18.9984032	6	0.0006
Magnesium	Mg	24.3050	9	0.0012
Praseodymium	Pr	140.90765	5	0.0037
Oxygen	O	15.9994	999999	85.0495
Selenium	Se	78.96	2	0.0008
Sulfur	S	32.065	3	0.0005
Silver	Ag	107.8682	3	0.0017
Chlorine	Cl	35.453	9	0.0017
Carbon	C	12.0107	1	0.0001
Nitrogen	N	14.0067	46	0.0034
Uranium	U	238.02891	65	0.0822
Calcium	Ca	40.078	25	0.0053
Tin	Sn	118.710	25	0.0158
Hassium	Hs	270.1347	108	0.1551
Meitnerium	Mt	276.1512	9999	14.6782

Computing molar mass step by step
First, compute the number of each atom in H₂SiF₆Mg₉Pr₅O₉₉₉₉₉₉Se₂S₃Ag₃Cl₉CNU₆₅N₄₅Ca₂₅Sn₂₅Hs₁₀₈Mt₉₉₉₉: H: 2, Si: 1, F: 6, Mg: 9, Pr: 5, O: 999999, Se: 2, S: 3, Ag: 3, Cl: 9, C: 1, N: 46, U: 65, Ca: 25, Sn: 25, Hs: 108, Mt: 9999 Then, lookup atomic weights for each element in periodic table: H: 1.00794, Si: 28.0855, F: 18.9984032, Mg: 24.305, Pr: 140.90765, O: 15.9994, Se: 78.96, S: 32.065, Ag: 107.8682, Cl: 35.453, C: 12.0107, N: 14.0067, U: 238.02891, Ca: 40.078, Sn: 118.71, Hs: 270.13465, Mt: 276.15116 Now, compute the sum of products of number of atoms to the atomic weight: Molar mass (H₂SiF₆Mg₉Pr₅O₉₉₉₉₉₉Se₂S₃Ag₃Cl₉CNU₆₅N₄₅Ca₂₅Sn₂₅Hs₁₀₈Mt₉₉₉₉) = ∑ Count_i * Weight_i = Count(H) * Weight(H) + Count(Si) * Weight(Si) + Count(F) * Weight(F) + Count(Mg) * Weight(Mg) + Count(Pr) * Weight(Pr) + Count(O) * Weight(O) + Count(Se) * Weight(Se) + Count(S) * Weight(S) + Count(Ag) * Weight(Ag) + Count(Cl) * Weight(Cl) + Count(C) * Weight(C) + Count(N) * Weight(N) + Count(U) * Weight(U) + Count(Ca) * Weight(Ca) + Count(Sn) * Weight(Sn) + Count(Hs) * Weight(Hs) + Count(Mt) * Weight(Mt) = 2 * 1.00794 + 1 * 28.0855 + 6 * 18.9984032 + 9 * 24.305 + 5 * 140.90765 + 999999 * 15.9994 + 2 * 78.96 + 3 * 32.065 + 3 * 107.8682 + 9 * 35.453 + 1 * 12.0107 + 46 * 14.0067 + 65 * 238.02891 + 25 * 40.078 + 25 * 118.71 + 108 * 270.13465 + 9999 * 276.15116 = 18811856.0613 g/mol

Mass percent composition	Atomic percent composition

Formula in Hill system is CH₂Ag₃Ca₂₅Cl₉F₆Hs₁₀₈Mg₉Mt₉₉₉₉N₄₆O₉₉₉₉₉₉Pr₅S₃Se₂SiSn₂₅U₆₅

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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