Answer :
The average atomic mass of the element X is 85.5257 amu
Data obtained from the question
Ffrom the question given above, the following data were obtained:
- Abundance of isotope 1 = 75.15%
- Mass of isotope 1 = 83.9118 amu
- Abundance of isotope 2 = 25.85%
- Mass of isotope isotope = 186.9092 amu
- Average atomic mass =?
How to determine the average atomic mass
The average atomic mass of the element can be obtained as illustrated below:
Average atomic mass = [(Mass of isotope 1 × Abundance of isotope 1)/100] + [(Mass of isotope 2 × Abundance of isotope 2)/100]
Average atomic mass = [(83.9118 × 75.15)/100] + [(86.9092 × 25.85)/100]
Average atomic mass = 85.5257 amu
Thus, the average atomic mass of the element is 85.5257 amu
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