Molar Mass of MgS (Magnesium Sulfide)

Molar Mass Calculator

What is the molar mass of MgS?

Answer

M(MgS) ≈

56.37 g/mol

Atomic weights: IUPAC standard values (CIAAW, 2024); the sum is rounded to the decimal places of the least precise one — S: 32.06.

Contribution of each element
Element	Atoms, n	Atomic weight, A	n × A, g/mol Mass fraction, w	Mass fraction, w
Mgmagnesium	1	24.305	24.305 w ≈ 43.12%	≈ 43.12%
Ssulfur	1	32.06	32.06 w ≈ 56.88%	≈ 56.88%
Σ = 56.365 ≈ 56.37 g/mol w = 100%				100%

Atomic weights: CIAAW, Abridged Standard Atomic Weights (2024)

Mass fractions of the elements

S 56.88%Mg 43.12%

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Molar masses of substances nearby

Formula	M, g/mol
CaO (calcium oxide)	56.077
KOH (potassium hydroxide)	56.105
C₄H₈ (isobutylene)	56.108
MgS (magnesium sulfide)	56.37
C₃H₆O (acetone)	58.080
KF (potassium fluoride)	58.096
C₄H₁₀ (butane)	58.124

FAQ

What is the molar mass of MgS?

M(MgS) ≈ 56.37 g/mol

How to calculate the molar mass of MgS?

Add up the atomic weights of all the atoms in the formula: 24.305 + 32.06 = 56.365 ≈ 56.37 g/mol.

How many grams are in 2 moles of MgS?

m = n × M = 2 mol × 56.37 g/mol = 112.74 g.

See Also