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The boiling point of a pure organic liq...

The boiling point of a pure organic liquid is `78^(@)C`. There are two samples of this liquid having boiling range: (1) `76 - 78^(@)C and 69 - 78^(@)C` respectively. Which one of them is more pure and why?

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The first sample `("boiling range": 76 - 78^(@))` us more pure because its boiling range is shorter.
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