Molar Mass Of Compounds
Because the definitions of both the mole and the formula mass are based on the same reference substance, 12 C, the molar mass of any compound is numerically equivalent to its formula weight in amu. Master molar mass calculations for compoundsfollow stepbystep examples (CO, CO, HO, Ca (NO)), plus printable study cards and interactive practice. Read our article on how to calculate molar mass.
This molar mass calculator will find the molar mass of a compound and show a step-by-step solution including all calculations to get the answer. The molar mass of a substance, also often called molecular mass or molecular weight (although the definitions are not strictly identical, but it is only sensitive in very defined areas), is the weight of a defined amount of molecules of the substance (a mole) and is expressed in g/mol. To determine the molar mass of each element in the compound, multiply the relative atomic mass by the number of atoms in the compound.
This gives you the relative amount that each element contributes to the compound. The molecular mass (for molecular compounds) and formula mass (for non-molecular compounds, such as ionic salts) are commonly used as synonyms of molar mass, as the numerical values are identical (for all practical purposes), differing only in units (dalton vs. g/mol or kg/kmol).
In chemistry, the molar mass is the mass in grams per mole (g/mol) or kilograms per mole (kg/mol) of a substance. Molar mass is an intensive property of matter, meaning its value does not depend on sample size. Learn how to calculate molar mass with our step-by-step guide.
Understand the formula and see practical examples for easy chemistry calculations. The molar mass of a substance is the mass of one mole of that substance. It is numerically equal to the average atomic or molecular mass (in atomic mass units, amu) expressed in grams per mole (g/mol).
The molar mass of any compound is the mass in grams of one mole of that compound. One mole of carbon dioxide molecules has a mass of 44.01 g, while one mole of sodium sulfide formula units has a mass of 78.04 g.
