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`A compound known as deuterium oxide, or "heavy water" is sometimes used in nuclear research. It is water, but each hydrogen atom in a "heavy water" molecule has a neutron in the nucleus in addition to the normal proton. So, what would be the percent hydrogen (by mass) in a "heavy water" molecule?

Respuesta :

Manetho

Answer:

20%

Explanation:

molecular formula of  deuterium oxide, or "heavy water" is [tex]D_2O[/tex]

molecular weight of D2= 4.028204 g/mol

molecular weight of oxygen= 16 g/mol

therefore, molecular weight of water = 20.028204 g/mol

therefore,  the percent hydrogen (by mass) in a "heavy water" molecule

=(molecular weight of D2/molecular weight of water)

[tex]= \frac{4}{20.028204}\times100[/tex]

= 20%

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