C7H3Al3Br3C[14]3Ca23Cl23Cu3Fe32K53Mg3Mn3N73Na32O83Re3S2U300 molar mass

Molar Mass, Molecular Weight and Elemental Composition Calculator

Molecular weight of C₇H₃Al₃Br₃¹⁴C₃Ca₂₃Cl₂₃Cu₃Fe₃₂K₅₃Mg₃Mn₃N₇₃Na₃₂O₈₃Re₃S₂U₃₀₀ is 81592.1310 g/mol

Convert between C₇H₃Al₃Br₃¹⁴C₃Ca₂₃Cl₂₃Cu₃Fe₃₂K₅₃Mg₃Mn₃N₇₃Na₃₂O₈₃Re₃S₂U₃₀₀ weight and moles

Compound	Moles		Weight, g
C₇H₃Al₃Br₃¹⁴C₃Ca₂₃Cl₂₃Cu₃Fe₃₂K₅₃Mg₃Mn₃N₇₃Na₃₂O₈₃Re₃S₂U₃₀₀

Elemental composition of C₇H₃Al₃Br₃¹⁴C₃Ca₂₃Cl₂₃Cu₃Fe₃₂K₅₃Mg₃Mn₃N₇₃Na₃₂O₈₃Re₃S₂U₃₀₀

Element	Symbol	Atomic weight	Atoms	Mass percent
Carbon	C	12.0107	7	0.1030
Hydrogen	H	1.00794	3	0.0037
Aluminum	Al	26.9815386	3	0.0992
Bromine	Br	79.904	3	0.2938
Carbon	¹⁴C	14.003241989	3	0.0515
Calcium	Ca	40.078	23	1.1298
Chlorine	Cl	35.453	23	0.9994
Copper	Cu	63.546	3	0.2336
Iron	Fe	55.845	32	2.1902
Potassium	K	39.0983	53	2.5397
Magnesium	Mg	24.3050	3	0.0894
Manganese	Mn	54.938045	3	0.2020
Nitrogen	N	14.0067	73	1.2532
Sodium	Na	22.98976928	32	0.9016
Oxygen	O	15.9994	83	1.6275
Rhenium	Re	186.207	3	0.6847
Sulfur	S	32.065	2	0.0786
Uranium	U	238.02891	300	87.5191

Computing molar mass step by step
First, compute the number of each atom in C₇H₃Al₃Br₃¹⁴C₃Ca₂₃Cl₂₃Cu₃Fe₃₂K₅₃Mg₃Mn₃N₇₃Na₃₂O₈₃Re₃S₂U₃₀₀: C: 7, H: 3, Al: 3, Br: 3, ¹⁴C: 3, Ca: 23, Cl: 23, Cu: 3, Fe: 32, K: 53, Mg: 3, Mn: 3, N: 73, Na: 32, O: 83, Re: 3, S: 2, U: 300 Then, lookup atomic weights for each element in periodic table: C: 12.0107, H: 1.00794, Al: 26.9815386, Br: 79.904, ¹⁴C: 14.003241989, Ca: 40.078, Cl: 35.453, Cu: 63.546, Fe: 55.845, K: 39.0983, Mg: 24.305, Mn: 54.938045, N: 14.0067, Na: 22.98976928, O: 15.9994, Re: 186.207, S: 32.065, U: 238.02891 Now, compute the sum of products of number of atoms to the atomic weight: Molar mass (C₇H₃Al₃Br₃¹⁴C₃Ca₂₃Cl₂₃Cu₃Fe₃₂K₅₃Mg₃Mn₃N₇₃Na₃₂O₈₃Re₃S₂U₃₀₀) = ∑ Count_i * Weight_i = Count(C) * Weight(C) + Count(H) * Weight(H) + Count(Al) * Weight(Al) + Count(Br) * Weight(Br) + Count(¹⁴C) * Weight(¹⁴C) + Count(Ca) * Weight(Ca) + Count(Cl) * Weight(Cl) + Count(Cu) * Weight(Cu) + Count(Fe) * Weight(Fe) + Count(K) * Weight(K) + Count(Mg) * Weight(Mg) + Count(Mn) * Weight(Mn) + Count(N) * Weight(N) + Count(Na) * Weight(Na) + Count(O) * Weight(O) + Count(Re) * Weight(Re) + Count(S) * Weight(S) + Count(U) * Weight(U) = 7 * 12.0107 + 3 * 1.00794 + 3 * 26.9815386 + 3 * 79.904 + 3 * 14.003241989 + 23 * 40.078 + 23 * 35.453 + 3 * 63.546 + 32 * 55.845 + 53 * 39.0983 + 3 * 24.305 + 3 * 54.938045 + 73 * 14.0067 + 32 * 22.98976928 + 83 * 15.9994 + 3 * 186.207 + 2 * 32.065 + 300 * 238.02891 = 81592.1310 g/mol

Mass percent composition	Atomic percent composition

Formula in Hill system is C₇H₃Al₃Br₃C[14]₃Ca₂₃Cl₂₃Cu₃Fe₃₂K₅₃Mg₃Mn₃N₇₃Na₃₂O₈₃Re₃S₂U₃₀₀

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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