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If the empirical formula is known what additional data is needed to calculate the molecular mass?

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If the empirical formula is known what additional data is needed to calculate the molecular mass?

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  1. you need to know find out how many moles are in the empirical formula mass

    we can find moles from gas laws, freezing point depressions , boiling point elevations , etc

    then we will take the empirical formula mass & divide by its # of moles ,... & that's molar mass

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