An unknown metal is observed to react with nitric acid with the release of hydrogen gas. A laboratory technician performs a mass spectrometry analysis of the
unreacted element to discover its identity. The data table shows the results of this
analysis.

Mass (amu)
23.985 (1)
24.906 (2)
25.982 (3)

Abundance (%)
78.99 (1)
10.00 (2)
11.01 (3)

a. Calculate the part of the element's atomic mass from each type of isotope in the
sample.