What do you mean by the term molar mass in chemistry ?


Mass of one mole of any material is called its molar mass. The molar mass is measured in the units of gram per mole (g/mole), or kilogram per mole (kg/mol). One mole contains 6.023 × 1023 chemical units. Therefore,

Molar mass of a substance = Mass of 6.023 × 1023 chemical units of the substance

For example,


Molar mass of hydrogen (H2) = Mass of 6.023 × 1023 molecules of hydrogen


Mass of 6.023 × 1023 molecules of a substance = Gram-molecular mass of the substance

And Gram-molecular mass of hydrogen= 2.016g


So, Molar mass of hydrogen = 2.016 g/mol


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