H1He1Li1Be1UUS1UUB1B1Ar1C1N1O1F1Ne1Na1Mg1Al1SI1P1S1Cl1K1Ca1 molar mass

Molar Mass, Molecular Weight and Elemental Composition Calculator

Molar mass of H₁He₁Li₁Be₁UUS₁UUB₁B₁Ar₁C₁N₁O₁F₁Ne₁Na₁Mg₁Al₁SI₁P₁S₁Cl₁K₁Ca₁ is 1558.8231 g/mol

Convert between H₁He₁Li₁Be₁UUS₁UUB₁B₁Ar₁C₁N₁O₁F₁Ne₁Na₁Mg₁Al₁SI₁P₁S₁Cl₁K₁Ca₁ weight and moles

Compound	Moles		Weight, g
H₁He₁Li₁Be₁UUS₁UUB₁B₁Ar₁C₁N₁O₁F₁Ne₁Na₁Mg₁Al₁SI₁P₁S₁Cl₁K₁Ca₁

Elemental composition of H₁He₁Li₁Be₁UUS₁UUB₁B₁Ar₁C₁N₁O₁F₁Ne₁Na₁Mg₁Al₁SI₁P₁S₁Cl₁K₁Ca₁

Element	Symbol	Atomic weight	Atoms	Mass percent
Hydrogen	H	1.00794	1	0.0647
Helium	He	4.002602	1	0.2568
Lithium	Li	6.941	1	0.4453
Beryllium	Be	9.012182	1	0.5781
Uranium	U	238.02891	4	61.0791
Sulfur	S	32.065	3	6.1710
Boron	B	10.811	2	1.3871
Argon	Ar	39.948	1	2.5627
Carbon	C	12.0107	1	0.7705
Nitrogen	N	14.0067	1	0.8985
Oxygen	O	15.9994	1	1.0264
Fluorine	F	18.9984032	1	1.2188
Neon	Ne	20.1797	1	1.2945
Sodium	Na	22.98976928	1	1.4748
Magnesium	Mg	24.3050	1	1.5592
Aluminum	Al	26.9815386	1	1.7309
Iodine	I	126.90447	1	8.1410
Phosphorus	P	30.973762	1	1.9870
Chlorine	Cl	35.453	1	2.2743
Potassium	K	39.0983	1	2.5082
Calcium	Ca	40.078	1	2.5710

Computing molar mass step by step
First, compute the number of each atom in H₁He₁Li₁Be₁UUS₁UUB₁B₁Ar₁C₁N₁O₁F₁Ne₁Na₁Mg₁Al₁SI₁P₁S₁Cl₁K₁Ca₁: H: 1, He: 1, Li: 1, Be: 1, U: 4, S: 3, B: 2, Ar: 1, C: 1, N: 1, O: 1, F: 1, Ne: 1, Na: 1, Mg: 1, Al: 1, I: 1, P: 1, Cl: 1, K: 1, Ca: 1 Then, lookup atomic weights for each element in periodic table: H: 1.00794, He: 4.002602, Li: 6.941, Be: 9.012182, U: 238.02891, S: 32.065, B: 10.811, Ar: 39.948, C: 12.0107, N: 14.0067, O: 15.9994, F: 18.9984032, Ne: 20.1797, Na: 22.98976928, Mg: 24.305, Al: 26.9815386, I: 126.90447, P: 30.973762, Cl: 35.453, K: 39.0983, Ca: 40.078 Now, compute the sum of products of number of atoms to the atomic weight: Molar mass (H₁He₁Li₁Be₁UUS₁UUB₁B₁Ar₁C₁N₁O₁F₁Ne₁Na₁Mg₁Al₁SI₁P₁S₁Cl₁K₁Ca₁) = ∑ Count_i * Weight_i = Count(H) * Weight(H) + Count(He) * Weight(He) + Count(Li) * Weight(Li) + Count(Be) * Weight(Be) + Count(U) * Weight(U) + Count(S) * Weight(S) + Count(B) * Weight(B) + Count(Ar) * Weight(Ar) + Count(C) * Weight(C) + Count(N) * Weight(N) + Count(O) * Weight(O) + Count(F) * Weight(F) + Count(Ne) * Weight(Ne) + Count(Na) * Weight(Na) + Count(Mg) * Weight(Mg) + Count(Al) * Weight(Al) + Count(I) * Weight(I) + Count(P) * Weight(P) + Count(Cl) * Weight(Cl) + Count(K) * Weight(K) + Count(Ca) * Weight(Ca) = 1 * 1.00794 + 1 * 4.002602 + 1 * 6.941 + 1 * 9.012182 + 4 * 238.02891 + 3 * 32.065 + 2 * 10.811 + 1 * 39.948 + 1 * 12.0107 + 1 * 14.0067 + 1 * 15.9994 + 1 * 18.9984032 + 1 * 20.1797 + 1 * 22.98976928 + 1 * 24.305 + 1 * 26.9815386 + 1 * 126.90447 + 1 * 30.973762 + 1 * 35.453 + 1 * 39.0983 + 1 * 40.078 = 1558.8231 g/mol

Mass percent composition	Atomic percent composition

Formula in Hill system is CHAlArB₂BeCaClFHeIKLiMgNNaNeOPS₃U₄

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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