Question

51.86% of all the isotopes of an element have a mass of 106.82 amu and 48.14% have a mass of 109.03 amu.

What is the average mass of this element?

Answer 1

Average Mass = 107.88 amu

Step-by-step explanation:

We can calculate the average mass of an element by mutlpying the mass of its isotopes by their respective relative abundance and then making a total sum. Meaning that for this case:

• Average Mass = 106.82 amu * 51.86/100 + 109.03 amu * 48.14/100

• Average Mass = 107.88 amu