Molar mass

Molar Mass of Magnesium Chloride Hexahydrate

The molar mass of magnesium chloride hexahydrate (MgCl2·6H2O) is 203.295 g/mol.

Magnesium Chloride Hexahydrate at a glance

PropertyValue
Molar mass203.295 g/mol
Molecular weight203.295 u
Chemical formulaMgCl2·6H2O
Monoisotopic mass201.986135 u
CAS number7791-18-6
PubChem CID24644

How to calculate the molar mass of magnesium chloride hexahydrate

1 × 24.305 + 2 × 35.45 + 12 × 1.008 + 6 × 15.999 = 203.295 g/mol

  1. Count the atoms in MgCl2·6H2O: Mg 1, Cl 2, H 12, O 6.
  2. Multiply each atom count by the atomic weight of the element.
  3. Add the results to get 203.295 g/mol.

Elemental composition of magnesium chloride hexahydrate

ElementAtomsAtomic weightMass (g/mol)Mass %
Mg Magnesium124.30524.30511.956%
Cl Chlorine235.4570.934.875%
H Hydrogen121.00812.0965.95%
O Oxygen615.99995.99447.219%

Grams and moles of magnesium chloride hexahydrate

AmountEquals
1 g0.004919 mol
10 g0.04919 mol
100 g0.4919 mol
0.1 mol20.33 g
1 mol203.3 g
1 g, in particles2.9623 × 10^21