imranaakhter123 imranaakhter123

25-03-2021
Chemistry

contestada

Help me answer this chemistry question. thank you!

Help me answer this chemistry question thank you class=

Respuesta :

maacastrobr maacastrobr

30-03-2021

Answer:

78.85

Explanation:

To calculate the average atomic mass of the isotopes we use the given masses and abundances, as follows:

Mass of Isotope 1 * Abundance of Isotope 1 + Mass of Isotope 2 * Abundance of Isotope 2 + ....

In other words:

78 amu * 75/100 + 81 amu * 15/100 + 82 amu * 10/100 = 78.85

So the answer is 78.85.

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