Molar Mass of KBrO3 (Potassium Bromate)

Molar Mass Calculator

What is the molar mass of KBrO₃?

Answer

M(KBrO₃) =

166.999 g/mol

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

Contribution of each element
Element	Atoms, n	Atomic weight, A	n × A, g/mol Mass fraction, w	Mass fraction, w
Kpotassium	1	39.098	39.098 w ≈ 23.41%	≈ 23.41%
Brbromine	1	79.904	79.904 w ≈ 47.85%	≈ 47.85%
Ooxygen	3	15.999	47.997 w ≈ 28.74%	≈ 28.74%
Σ = 166.999 g/mol w = 100%				100%

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

Mass fractions of the elements

Br 47.85%

O 28.74%K 23.41%

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Molar masses of substances nearby

Formula	M, g/mol
C₉H₁₁NO₂ (phenylalanine)	165.192
KI (potassium iodide)	166.00
C₈H₆O₄ (terephthalic acid)	166.132
KBrO₃ (potassium bromate)	166.999
Er (erbium)	167.26
Tm (thulium)	168.93
C₃H₈NO₅P (glyphosate)	169.073

FAQ

What is the molar mass of KBrO3?

M(KBrO₃) = 166.999 g/mol

How to calculate the molar mass of KBrO₃?

Add up the atomic weights of all the atoms in the formula: 39.098 + 79.904 + 3 × 15.999 = 166.999 g/mol.

How many grams are in 2 moles of KBrO₃?

m = n × M = 2 mol × 166.999 g/mol = 333.998 g.

See Also