Question #df090
1 Answer
Aug 23, 2017
The average mass of a gallium atom is 69.7 u.
Explanation:
The average mass is a weighted average of the isotopic masses:
You multiply each atomic mass by its relative importance (percentage).
Note: The answer can have only two significant figures, because that is all you gave for the abundance of gallium-69.
However, I calculated the result to three significant figures for you.
