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How is it possible for two substances with the same empirical formula to have markedly different properties?

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Two compounds have the same empirical formula. One substance is a gas, the other is a viscous liquid. How is it possible for two substances with the same empirical formula to have markedly different properties?

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The expert examines the same empirical formula to have markedly different properties

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The empirical formula is the most simplified formula for a compound. However, a molecular formula can be the same as the ...

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