Define molecular mass of a substance.

1.	Define molecular mass of a substance.
Answer» Molecular mass of a substance (element or compound) represents the number of times the molecule of that substance is heavier than 1/12^th of the mass of an atom of C -12 isotope. Molecular mass = 2 x Vapour density

Answer»

Molecular mass of a substance (element or compound) represents the number of times the molecule of that substance is heavier than 1/12^th of the mass of an atom of C -12 isotope.

Molecular mass = 2 x Vapour density

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Define molecular mass of a substance.

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