Molar Mass Calculator
Calculate the molar mass of a compound from the mass of a sample and the number of moles.
Molar Mass Calculator
Calculate the molar mass of a compound from the mass of a sample and the number of moles.
Formula
Molar Mass = mass (g) / moles (mol)What is This Tool?
Molar mass is the mass of one mole of a substance, expressed in grams per mole (g/mol). It numerically equals the molecular or formula weight of the substance and is fundamental for converting between mass and moles in chemical calculations.
Formula
Molar Mass = m / n
Where:
m = mass of sample (g)
n = number of moles (mol)Worked Examples
1. Sodium Chloride (NaCl)
Given: 58.44 g of NaCl, 1 mol
Molar Mass = 58.44 g / 1 mol
Result: 58.44 g/mol
2. Water (H2O)
Given: 36.03 g of water, 2 mol
Molar Mass = 36.03 g / 2 mol
Molar Mass = 18.015 g/mol
Result: 18.015 g/mol
3. Unknown compound
Given: 180 g sample, 0.5 mol
Molar Mass = 180 g / 0.5 mol
Result: 360 g/mol
Frequently Asked Questions