An element has three isotopes: isotope A with a mass of 12.0...

Question

An element has three isotopes: isotope A with a mass of 12.0 amu and a fractional abundance of 0.25, isotope B with a mass of 13.0 amu and a fractional abundance of 0.50, and isotope C with a mass of 14.0 amu and a fractional abundance of 0.25. The average atomic mass of this element is ________ amu.

Question Analysis
This question assesses the student's ability to calculate the average atomic mass of an element with multiple isotopes using their isotopic masses and fractional abundances.

Key Concept Explanation
The average atomic mass is the sum of the products of the isotopic masses and their respective fractional abundances.

Step-by-step Solution
1. Identify the given values: isotopic masses and fractional abundances.
2. Use the formula: .
3. Calculate the contribution of each isotope:

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