Molar mass of magnesium hydroxide (Mg(OH)2)

The molar mass of magnesium hydroxide (Mg(OH)2) is 58.319 g/mol.

milk of magnesia

Step-by-step calculation

Element	Atoms	Atomic mass	Subtotal
Magnesium	× 1	24.305	= 24.305
Oxygen	× 2	15.999	= 31.998
Hydrogen	× 2	1.008	= 2.016
Total			58.319 g/mol

Percent composition by element

Magnesium 41.68%
Oxygen 54.87%
Hydrogen 3.46%

Try another formula

H₂O NaCl CO₂ C₆H₁₂O₆ H₂SO₄ Ca(OH)₂ CuSO₄·5H₂O C₈H₁₀N₄O₂

Could not read that formula

Related compounds

MgSO₄·7H₂O Magnesium sulfate heptahydrate MgCl₂·6H₂O Magnesium chloride hexahydrate MgNH₄PO₄·6H₂O Struvite Mg₃Si₄O₁₀(OH)₂ Talc C₅₅H₇₂MgN₄O₅ Chlorophyll a NaOH Sodium hydroxide

FAQ

What is the molar mass of Mg(OH)2?

The molar mass of magnesium hydroxide (Mg(OH)2) is 58.319 g/mol.

How do you calculate the molar mass of Mg(OH)2?

Multiply the atomic mass of each element by the number of its atoms in Mg(OH)2, then add the results: 1 × 24.305 (Mg) + 2 × 15.999 (O) + 2 × 1.008 (H) = 58.319 g/mol.

What percentage of Mg(OH)2 is Oxygen?

Oxygen makes up 54.87% of the mass of magnesium hydroxide (Mg(OH)2).