Given that abundances of isotopes , and are , and respectively. The atomic mass of is:

Question

Given that abundances of isotopes ,  and  are ,  and  respectively. The atomic mass of  is:

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Strategy:
 To find the average atomic mass of an element with multiple isotopes, multiply the mass of each isotope by its fractional abundance (percentage divided by 100) and sum the results.

Step 1: Calculate contributions from each isotope
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Step 2: Sum the values
Total

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