Molar Mass of Br2 (Bromine)

Molar Mass Calculator

What is the molar mass of Br₂?

Answer

M(Br₂) =

159.808 g/mol

Atomic weights: IUPAC standard values (CIAAW, 2024).

One Br atom: M(Br) = 79.904 g/mol; Br₂ is two atoms.

Contribution of each element
Element	Atoms, n	Atomic weight, A	n × A, g/mol Mass fraction, w	Mass fraction, w
Brbromine	2	79.904	159.808 w = 100.00%	100.00%

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

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Molar Mass of Br (Bromine): Step by Step

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Molar masses of substances nearby

Formula	M, g/mol
Tb (terbium)	158.93
CuSO₄ (cupric sulfate)	159.60
Fe₂O₃ (iron(III) oxide)	159.687
Br₂ (bromine)	159.808
KC₆H₅CO₂ (potassium benzoate)	160.213
ZnSO₄ (zinc sulfate)	161.44
Na₂CrO₄ (sodium chromate)	161.972

FAQ

What is the molar mass of Br2?

M(Br₂) = 159.808 g/mol

How to calculate the molar mass of Br₂?

Add up the atomic weights of all the atoms in the formula: 2 × 79.904 = 159.808 g/mol.

How many grams are in 2 moles of Br₂?

m = n × M = 2 mol × 159.808 g/mol = 319.616 g.

See Also