Molar and molecular weight of MgCO3

• Molecular formula: MgCO3 or CMgO3
• Relative molecular weight of MgCO3: 84.3139
• Molar mass of MgCO3: 84.3139 g/mol (0.08431 kg/mol)

Calculation of the relative molecular and molar mass of MgCO3

• Mr[MgCO3] = Ar[C] + Ar[Mg] + Ar[O] * 3 = 12.0107 + 24.305 + 15.9994 * 3 = 84.3139
• Molar mass (kg/mol) = Mr[MgCO3] : 1000 = 84.3139 : 1000 = 0.08431 kg/mol

MgCO3: percent composition by element

• Carbon (C) = 12.0107 : 84.3139 * 100 = 14.245 %
• Magnesium (Mg) = 24.305 : 84.3139 * 100 = 28.827 %
• Oxygen (O) = 47.9982 : 84.3139 * 100 = 56.928 %

Molar mass calculator