Molar Mass of CoSO4 (Cobalt(II) Sulfate)

Molar Mass Calculator

What is the molar mass of CoSO₄?

Answer

M(CoSO₄) ≈

154.99 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
Cocobalt	1	58.933	58.933 w ≈ 38.02%	≈ 38.02%
Ssulfur	1	32.06	32.06 w ≈ 20.69%	≈ 20.69%
Ooxygen	4	15.999	63.996 w ≈ 41.29%	≈ 41.29%
Σ = 154.989 ≈ 154.99 g/mol w = 100%				100%

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

Mass fractions of the elements

O 41.29%Co 38.02%

S 20.69%

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
BaO (barium oxide)	153.33
CCl₄ (carbon tetrachloride)	153.81
NiSO₄ (nickel(II) sulfate)	154.75
CoSO₄ (cobalt(II) sulfate)	154.99
C₆H₉N₃O₂ (L-histidine)	155.157
CaCrO₄ (calcium chromate)	156.070
C₆H₅Br (bromobenzene)	157.010

FAQ

What is the molar mass of CoSO4?

M(CoSO₄) ≈ 154.99 g/mol

How to calculate the molar mass of CoSO₄?

Add up the atomic weights of all the atoms in the formula: 58.933 + 32.06 + 4 × 15.999 = 154.989 ≈ 154.99 g/mol.

How many grams are in 2 moles of CoSO₄?

m = n × M = 2 mol × 154.99 g/mol = 309.98 g.

See Also