Question

Укажите массовую долю кислорода в молекуле воды, образованной нуклидами 17 O и 3 H.

Answer 1

Атомная масса такого кислорода = 17, а атомная масса такого водорода или трития = 3. Ну и молекулярная масса такой воды = 3*2+17 = 23. Массовая доля кислорода 17/23 = 0.739 или 73.9%

Answer 2

Mass Fraction of Oxygen in Water Molecule

The mass fraction of oxygen in a water molecule, formed by the nuclides 17O and 3H, can be calculated using the atomic masses of oxygen and hydrogen.

The atomic mass of 17O is approximately 16.9991315 u, and the atomic mass of 3H (tritium) is approximately 3.0160492 u.

To calculate the mass fraction of oxygen in the water molecule, we can use the following formula:

Mass Fraction of Oxygen (17O) = (Mass of 17O in the molecule) / (Total mass of the molecule)

The total mass of the water molecule can be calculated as the sum of the atomic masses of the constituent atoms.

Using the atomic masses provided, we can calculate the mass fraction of oxygen in the water molecule.