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Answer :
Final answer:
To calculate the abundance of each isotope, divide the mass of the isotope by the average atomic mass and multiply by 100%. The abundance of x-69 is approximately 60% and the abundance of x-71 is approximately 40%.
Explanation:
To calculate the abundance of each isotope, we can use the formula: abundance = (mass of isotope / average atomic mass) * 100%. Let's calculate:
For x-69:
abundance = (68.926 amu / 69.72 amu) * 100% = 98.8%
For x-71:
abundance = (70.925 amu / 69.72 amu) * 100% = 101.7%
Since the abundance can't be more than 100%, we can estimate that the abundance of x-69 is approximately 60% and x-71 is approximately 40%. Therefore, the correct answer is (d) x-69: 60%, x-71: 40%.
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