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Do comets always contain water

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Anonymous

13y ago
Updated: 8/20/2019

Comets contain a small amount of so-called "heavy water" composed of equal parts hydrogen, oxygen, and deuterium. (Deuterium is an isotope of hydrogen with one extra neutron in its nucleus.) The chemical formula of heavy water is HDO; normal water is H2O.

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Wiki User

13y ago

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