D13402C[13]773O[16]963U66Xe244Ar876Ne333P78S373O777N1875 molar mass

Molar Mass, Molecular Weight and Elemental Composition Calculator

Molecular weight of D₁₃₄₀₂¹³C₇₇₃¹⁶O₉₆₃U₆₆Xe₂₄₄Ar₈₇₆Ne₃₃₃P₇₈S₃₇₃O₇₇₇N₁₈₇₅ is 194977.6710 g/mol

Convert between D₁₃₄₀₂¹³C₇₇₃¹⁶O₉₆₃U₆₆Xe₂₄₄Ar₈₇₆Ne₃₃₃P₇₈S₃₇₃O₇₇₇N₁₈₇₅ weight and moles

Compound	Moles		Weight, g
D₁₃₄₀₂¹³C₇₇₃¹⁶O₉₆₃U₆₆Xe₂₄₄Ar₈₇₆Ne₃₃₃P₇₈S₃₇₃O₇₇₇N₁₈₇₅

Elemental composition of D₁₃₄₀₂¹³C₇₇₃¹⁶O₉₆₃U₆₆Xe₂₄₄Ar₈₇₆Ne₃₃₃P₇₈S₃₇₃O₇₇₇N₁₈₇₅

Element	Symbol	Atomic weight	Atoms	Mass percent
Hydrogen	D	2.0141017778	13402	13.8441
Carbon	¹³C	13.003354838	773	5.1553
Oxygen	¹⁶O	15.9949146196	963	7.8999
Uranium	U	238.02891	66	8.0573
Xenon	Xe	131.293	244	16.4303
Argon	Ar	39.948	876	17.9479
Neon	Ne	20.1797	333	3.4465
Phosphorus	P	30.973762	78	1.2391
Sulfur	S	32.065	373	6.1342
Oxygen	O	15.9994	777	6.3759
Nitrogen	N	14.0067	1875	13.4695

Computing molar mass step by step
First, compute the number of each atom in D₁₃₄₀₂¹³C₇₇₃¹⁶O₉₆₃U₆₆Xe₂₄₄Ar₈₇₆Ne₃₃₃P₇₈S₃₇₃O₇₇₇N₁₈₇₅: D: 13402, ¹³C: 773, ¹⁶O: 963, U: 66, Xe: 244, Ar: 876, Ne: 333, P: 78, S: 373, O: 777, N: 1875 Then, lookup atomic weights for each element in periodic table: D: 2.0141017778, ¹³C: 13.0033548378, ¹⁶O: 15.99491461956, U: 238.02891, Xe: 131.293, Ar: 39.948, Ne: 20.1797, P: 30.973762, S: 32.065, O: 15.9994, N: 14.0067 Now, compute the sum of products of number of atoms to the atomic weight: Molar mass (D₁₃₄₀₂¹³C₇₇₃¹⁶O₉₆₃U₆₆Xe₂₄₄Ar₈₇₆Ne₃₃₃P₇₈S₃₇₃O₇₇₇N₁₈₇₅) = ∑ Count_i * Weight_i = Count(D) * Weight(D) + Count(¹³C) * Weight(¹³C) + Count(¹⁶O) * Weight(¹⁶O) + Count(U) * Weight(U) + Count(Xe) * Weight(Xe) + Count(Ar) * Weight(Ar) + Count(Ne) * Weight(Ne) + Count(P) * Weight(P) + Count(S) * Weight(S) + Count(O) * Weight(O) + Count(N) * Weight(N) = 13402 * 2.0141017778 + 773 * 13.0033548378 + 963 * 15.99491461956 + 66 * 238.02891 + 244 * 131.293 + 876 * 39.948 + 333 * 20.1797 + 78 * 30.973762 + 373 * 32.065 + 777 * 15.9994 + 1875 * 14.0067 = 194977.6710 g/mol

Mass percent composition	Atomic percent composition

Formula in Hill system is Ar₈₇₆C[13]₇₇₃D₁₃₄₀₂N₁₈₇₅Ne₃₃₃O₇₇₇O[16]₉₆₃P₇₈S₃₇₃U₆₆Xe₂₄₄

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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