Hi, I was wondering if you could help me with a question. Do I just take the percentage of each isotope times the weight of each isotope over 100 to get the average atomic weight?   The natural abundances of the three stable isotopes of magnesuim are 78.99% magnesium-24 (23.98504 u), 10.0 % magnesium-25 (24.9858 u), and 11.01% magnesium-26 (25.9829 u). Calculate the average atomic weight of magnesium.

Chemistry: The Molecular Science
5th Edition
ISBN:9781285199047
Author:John W. Moore, Conrad L. Stanitski
Publisher:John W. Moore, Conrad L. Stanitski
Chapter2: Chemical Compounds
Section: Chapter Questions
Problem 29QRT: Argon has three naturally occurring isotopes: 0.3336% 36Ar, 0.063% 38Ar, and 99.60% 40Ar. Estimate...
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Hi, I was wondering if you could help me with a question. Do I just take the percentage of each isotope times the weight of each isotope over 100 to get the average atomic weight?

 

The natural abundances of the three stable isotopes of magnesuim are 78.99% magnesium-24 (23.98504 u), 10.0 % magnesium-25 (24.9858 u), and 11.01% magnesium-26 (25.9829 u). Calculate the average atomic weight of magnesium.

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