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

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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 × 10²³chemical units. Therefore,

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

For example,

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

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But,

Mass of 6.023 × 10²³molecules 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