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What is the difference between the molar mass and the empirical formula mass of a compound? when are these masses the same, and when are they different? when different, how is the molar mass related to the empirical formula mass?

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manselandy
Molar mass is the mass of one stable molecule of a compound, that cannot join with another molecule of the same kind to form a new one, while an empirical formula is the molecular formula in its simplest form. E.g. empirical formula of ethene is CH2while its molecular formula is C2H4.

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