Molar and molecular weight of Mg(OH)2

• Relative molecular weight of Mg(OH)2: 58.31968
• Molar mass of Mg(OH)2: 58.31968 g/mol (0.05832 kg/mol)

Calculation of the relative molecular and molar mass of Mg(OH)2

• Mr[Mg(OH)2] = Ar[Mg] + Ar[O] * 2 + Ar[H] * 2 = 24.305 + 15.9994 * 2 + 1.00794 * 2 = 58.31968
• Molar mass (kg/mol) = Mr[Mg(OH)2] : 1000 = 58.31968 : 1000 = 0.05832 kg/mol

Mg(OH)2: percent composition by element

• Magnesium (Mg) = 24.305 : 58.31968 * 100 = 41.675 %
• Oxygen (O) = 31.9988 : 58.31968 * 100 = 54.868 %
• Hydrogen (H) = 2.01588 : 58.31968 * 100 = 3.457 %

Molar mass calculator