Molar Mass of ZnO (Zinc Oxide)

Molar Mass Calculator

What is the molar mass of ZnO?

Answer

M(ZnO) ≈

81.38 g/mol

Atomic weights: IUPAC standard values (CIAAW, 2024); the sum is rounded to the decimal places of the least precise one — Zn: 65.38.

Contribution of each element
Element	Atoms, n	Atomic weight, A	n × A, g/mol Mass fraction, w	Mass fraction, w
Znzinc	1	65.38	65.38 w ≈ 80.34%	≈ 80.34%
Ooxygen	1	15.999	15.999 w ≈ 19.66%	≈ 19.66%
Σ = 81.379 ≈ 81.38 g/mol w = 100%				100%

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

Mass fractions of the elements

Zn 80.34%

O 19.66%

Related Calculations

See Also

Liters to Kilograms - How many kilograms are in a liter of water, honey, gasoline, sand and other substances — by density
Grams to Kg - Convert Grams to Kilograms
Percentage Calculator: Fraction to Percent - What percentage one number is of another? Convert fraction into a percentage
Scientific Calculator with Memory & History - Free Engineering Calculator Online with Memory Function, Operation History, Logarithms & Trigonometry. Similar to ti-83, ti-84, ti-89

Recalculate with different values ↑

Molar masses of substances nearby

Formula	M, g/mol
SO₃ (sulfur trioxide)	80.06
HBr (hydrogen bromide)	80.912
H₂Se (hydrogen selenide)	80.987
ZnO (zinc oxide)	81.38
H₃PO₃ (phosphonic acid)	81.995
CH₃COONa (sodium acetate)	82.034
H₂SO₃ (sulfurous acid)	82.07

FAQ

What is the molar mass of ZnO?

M(ZnO) ≈ 81.38 g/mol

How to calculate the molar mass of ZnO?

Add up the atomic weights of all the atoms in the formula: 65.38 + 15.999 = 81.379 ≈ 81.38 g/mol.

How many grams are in 2 moles of ZnO?

m = n × M = 2 mol × 81.38 g/mol = 162.76 g.

See Also