H69Li69B99C237N567O875F989Na1122Mg4598Al2597P5739Si3497As636 molar mass

Molar Mass, Molecular Weight and Elemental Composition Calculator

Molar mass of H₆₉Li₆₉B₉₉C₂₃₇N₅₆₇O₈₇₅F₉₈₉Na₁₁₂₂Mg₄₅₉₈Al₂₅₉₇P₅₇₃₉Si₃₄₉₇As₆₃₆ is 576439.5145 g/mol

Convert between H₆₉Li₆₉B₉₉C₂₃₇N₅₆₇O₈₇₅F₉₈₉Na₁₁₂₂Mg₄₅₉₈Al₂₅₉₇P₅₇₃₉Si₃₄₉₇As₆₃₆ weight and moles

Compound	Moles		Weight, g
H₆₉Li₆₉B₉₉C₂₃₇N₅₆₇O₈₇₅F₉₈₉Na₁₁₂₂Mg₄₅₉₈Al₂₅₉₇P₅₇₃₉Si₃₄₉₇As₆₃₆

Elemental composition of H₆₉Li₆₉B₉₉C₂₃₇N₅₆₇O₈₇₅F₉₈₉Na₁₁₂₂Mg₄₅₉₈Al₂₅₉₇P₅₇₃₉Si₃₄₉₇As₆₃₆

Element	Symbol	Atomic weight	Atoms	Mass percent
Hydrogen	H	1.00794	69	0.0121
Lithium	Li	6.941	69	0.0831
Boron	B	10.811	99	0.1857
Carbon	C	12.0107	237	0.4938
Nitrogen	N	14.0067	567	1.3777
Oxygen	O	15.9994	875	2.4286
Fluorine	F	18.9984032	989	3.2596
Sodium	Na	22.98976928	1122	4.4748
Magnesium	Mg	24.3050	4598	19.3870
Aluminum	Al	26.9815386	2597	12.1558
Phosphorus	P	30.973762	5739	30.8373
Silicon	Si	28.0855	3497	17.0382
Arsenic	As	74.92160	636	8.2663

Computing molar mass step by step
First, compute the number of each atom in H₆₉Li₆₉B₉₉C₂₃₇N₅₆₇O₈₇₅F₉₈₉Na₁₁₂₂Mg₄₅₉₈Al₂₅₉₇P₅₇₃₉Si₃₄₉₇As₆₃₆: H: 69, Li: 69, B: 99, C: 237, N: 567, O: 875, F: 989, Na: 1122, Mg: 4598, Al: 2597, P: 5739, Si: 3497, As: 636 Then, lookup atomic weights for each element in periodic table: H: 1.00794, Li: 6.941, B: 10.811, C: 12.0107, N: 14.0067, O: 15.9994, F: 18.9984032, Na: 22.98976928, Mg: 24.305, Al: 26.9815386, P: 30.973762, Si: 28.0855, As: 74.9216 Now, compute the sum of products of number of atoms to the atomic weight: Molar mass (H₆₉Li₆₉B₉₉C₂₃₇N₅₆₇O₈₇₅F₉₈₉Na₁₁₂₂Mg₄₅₉₈Al₂₅₉₇P₅₇₃₉Si₃₄₉₇As₆₃₆) = ∑ Count_i * Weight_i = Count(H) * Weight(H) + Count(Li) * Weight(Li) + Count(B) * Weight(B) + Count(C) * Weight(C) + Count(N) * Weight(N) + Count(O) * Weight(O) + Count(F) * Weight(F) + Count(Na) * Weight(Na) + Count(Mg) * Weight(Mg) + Count(Al) * Weight(Al) + Count(P) * Weight(P) + Count(Si) * Weight(Si) + Count(As) * Weight(As) = 69 * 1.00794 + 69 * 6.941 + 99 * 10.811 + 237 * 12.0107 + 567 * 14.0067 + 875 * 15.9994 + 989 * 18.9984032 + 1122 * 22.98976928 + 4598 * 24.305 + 2597 * 26.9815386 + 5739 * 30.973762 + 3497 * 28.0855 + 636 * 74.9216 = 576439.5145 g/mol

Mass percent composition	Atomic percent composition

Formula in Hill system is C₂₃₇H₆₉Al₂₅₉₇As₆₃₆B₉₉F₉₈₉Li₆₉Mg₄₅₉₈N₅₆₇Na₁₁₂₂O₈₇₅P₅₇₃₉Si₃₄₉₇

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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