O76N7HeAr2BS9H8U92Pu901UO2I2K2Na20LiFMgNe10CO2NH3C169723H270 molar mass

Molar Mass, Molecular Weight and Elemental Composition Calculator

Molar mass of O₇₆N₇HeAr₂BS₉H₈U₉₂Pu₉₀₁UO₂I₂K₂Na₂₀LiFMgNe₁₀CO₂NH₃C₁₆₉₇₂₃H₂₇₀ is 2278225.7626 g/mol

Convert between O₇₆N₇HeAr₂BS₉H₈U₉₂Pu₉₀₁UO₂I₂K₂Na₂₀LiFMgNe₁₀CO₂NH₃C₁₆₉₇₂₃H₂₇₀ weight and moles

Compound	Moles		Weight, g
O₇₆N₇HeAr₂BS₉H₈U₉₂Pu₉₀₁UO₂I₂K₂Na₂₀LiFMgNe₁₀CO₂NH₃C₁₆₉₇₂₃H₂₇₀

Elemental composition of O₇₆N₇HeAr₂BS₉H₈U₉₂Pu₉₀₁UO₂I₂K₂Na₂₀LiFMgNe₁₀CO₂NH₃C₁₆₉₇₂₃H₂₇₀

Element	Symbol	Atomic weight	Atoms	Mass percent
Oxygen	O	15.9994	80	0.0562
Nitrogen	N	14.0067	8	0.0049
Helium	He	4.002602	1	0.0002
Argon	Ar	39.948	2	0.0035
Boron	B	10.811	1	0.0005
Sulfur	S	32.065	9	0.0127
Hydrogen	H	1.00794	281	0.0124
Uranium	U	238.02891	93	0.9717
Plutonium	Pu	238.049560	901	9.4145
Iodine	I	126.90447	2	0.0111
Potassium	K	39.0983	2	0.0034
Sodium	Na	22.98976928	20	0.0202
Lithium	Li	6.941	1	0.0003
Fluorine	F	18.9984032	1	0.0008
Magnesium	Mg	24.3050	1	0.0011
Neon	Ne	20.1797	10	0.0089
Carbon	C	12.0107	169724	89.4777

Computing molar mass step by step
First, compute the number of each atom in O₇₆N₇HeAr₂BS₉H₈U₉₂Pu₉₀₁UO₂I₂K₂Na₂₀LiFMgNe₁₀CO₂NH₃C₁₆₉₇₂₃H₂₇₀: O: 80, N: 8, He: 1, Ar: 2, B: 1, S: 9, H: 281, U: 93, Pu: 901, I: 2, K: 2, Na: 20, Li: 1, F: 1, Mg: 1, Ne: 10, C: 169724 Then, lookup atomic weights for each element in periodic table: O: 15.9994, N: 14.0067, He: 4.002602, Ar: 39.948, B: 10.811, S: 32.065, H: 1.00794, U: 238.02891, Pu: 238.0495599, I: 126.90447, K: 39.0983, Na: 22.98976928, Li: 6.941, F: 18.9984032, Mg: 24.305, Ne: 20.1797, C: 12.0107 Now, compute the sum of products of number of atoms to the atomic weight: Molar mass (O₇₆N₇HeAr₂BS₉H₈U₉₂Pu₉₀₁UO₂I₂K₂Na₂₀LiFMgNe₁₀CO₂NH₃C₁₆₉₇₂₃H₂₇₀) = ∑ Count_i * Weight_i = Count(O) * Weight(O) + Count(N) * Weight(N) + Count(He) * Weight(He) + Count(Ar) * Weight(Ar) + Count(B) * Weight(B) + Count(S) * Weight(S) + Count(H) * Weight(H) + Count(U) * Weight(U) + Count(Pu) * Weight(Pu) + Count(I) * Weight(I) + Count(K) * Weight(K) + Count(Na) * Weight(Na) + Count(Li) * Weight(Li) + Count(F) * Weight(F) + Count(Mg) * Weight(Mg) + Count(Ne) * Weight(Ne) + Count(C) * Weight(C) = 80 * 15.9994 + 8 * 14.0067 + 1 * 4.002602 + 2 * 39.948 + 1 * 10.811 + 9 * 32.065 + 281 * 1.00794 + 93 * 238.02891 + 901 * 238.0495599 + 2 * 126.90447 + 2 * 39.0983 + 20 * 22.98976928 + 1 * 6.941 + 1 * 18.9984032 + 1 * 24.305 + 10 * 20.1797 + 169724 * 12.0107 = 2278225.7626 g/mol

Mass percent composition	Atomic percent composition

Formula in Hill system is C₁₆₉₇₂₄H₂₈₁Ar₂BFHeI₂K₂LiMgN₈Na₂₀Ne₁₀O₈₀Pu₉₀₁S₉U₉₃

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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