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Molar Mass

Calculate the molar mass, the amount of substance in mol and the mass. The molar mass is the ratio of mass and amount of substance. The unit for the amount of substance is mol. One mole are 6.02214085774 * 1023 particles (Avogadro constant). One mol C-12 has exactly 12 grams. Please enter two of the three values M, m and n, the other value and the amount of particles will be calculated.


Molar mass M:
Mass m:
Amount of substance n:
Amount of particles:


molar mass = mass / amount of substance, M = m / n
g = gramms, mg = milligrams = 1/1000 g, kg = kilograms = 1000 g
mmol = millimol = 1/1000 mol, kmol = kilomol = 1000 mol

Example: the molar mass of water is 18.015 g/mol. So 200 grams of water have 11.102 mol or 6.686 * 1024 particles of H2O.


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