The water found on Earth is almost entirely made up of the 1 H and 16 O isotopes

Question

The water found on Earth is almost entirely made up of the 1H and 16O isotopes for a formula of H2O and a molecular mass of 18.0 amu. What is the largest mass that a water molecule could have using other isotopes? Express the mass numerically in atomic mass units.
The water found on Earth is almost entirely made up of the 1H and 16O isotopes for a formula of H2O and a molecular mass of 18.0 amu. What is the largest mass that a water molecule could have using other isotopes? Express the mass numerically in atomic mass units.

Explanation / Answer

Heaviest isotope of hydrogen= H3

Heaviest isotope of oxygen= O18

Molecular mass of H2O= 2*3+ 18 = 24 amu

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