Molar mass

Molar Mass of Lactose Monohydrate

The molar mass of lactose monohydrate (C12H22O11·H2O) is 360.312 g/mol.

Lactose Monohydrate at a glance

PropertyValue
Molar mass360.312 g/mol
Molecular weight360.312 u
Chemical formulaC12H22O11·H2O
Monoisotopic mass360.126776 u
CAS number5989-81-1
PubChem CID104938

How to calculate the molar mass of lactose monohydrate

12 × 12.011 + 24 × 1.008 + 12 × 15.999 = 360.312 g/mol

  1. Count the atoms in C12H22O11·H2O: C 12, H 24, O 12.
  2. Multiply each atom count by the atomic weight of the element.
  3. Add the results to get 360.312 g/mol.

Elemental composition of lactose monohydrate

ElementAtomsAtomic weightMass (g/mol)Mass %
C Carbon1212.011144.13240.002%
H Hydrogen241.00824.1926.7142%
O Oxygen1215.999191.98853.284%

Grams and moles of lactose monohydrate

AmountEquals
1 g0.0027754 mol
10 g0.027754 mol
100 g0.27754 mol
0.1 mol36.031 g
1 mol360.31 g
1 g, in particles1.6714 × 10^21