Amused that the article calls heavy water "a hydrogen-rich substance". As far as... | Hacker News

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PhasmaFelis on Oct 22, 2018 | parent | context | favorite | on: Joachim Roenneberg, who foiled Nazi nuclear plan, ...

Amused that the article calls heavy water "a hydrogen-rich substance". As far as I'm aware it has exactly the same amount of hydrogen as regular water, by definition.

Presumably the author was going for "neutron-rich" but misremembered.

DuskStar on Oct 22, 2018 [–]

It does have more hydrogen (by weight) than regular water, just not by moles.

flashman on Oct 22, 2018 | [–]

Correct. A greater fraction of its weight is hydrogen due to the extra neutron, but it contains the same number of hydrogen atoms.

Heavy water masses 20g/mol versus 18g/mol for regular water.

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