1)    The element gallium (Ga) exists in two isotopic forms with the following abundances: 60.16% 69Ga and 39.84% 71Ga. Calculate the atomic mass of gallium. (The exact iso-topic mass of 69Ga is 68.9257. The exact isotopic mass of 71Ga is 70.9249.)  (2)   The element carbon (C) exists in two isotopic forms with the following abundances: 98.89% 12C and 1.11% 13C. Calculate the atomic mass of carbon

Chemistry for Engineering Students
4th Edition
ISBN:9781337398909
Author:Lawrence S. Brown, Tom Holme
Publisher:Lawrence S. Brown, Tom Holme
Chapter2: Atoms And Molecules
Section: Chapter Questions
Problem 2.16PAE: The element gallium, used in gallium arsenide semiconductors, has an atomic weight of 69.72 amu....
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(1)    The element gallium (Ga) exists in two isotopic forms with the following abundances: 60.16% 69Ga and 39.84% 71Ga. Calculate the atomic mass of gallium. (The exact iso-topic mass of 69Ga is 68.9257. The exact isotopic mass of 71Ga is 70.9249.) 

(2)   The element carbon (C) exists in two isotopic forms with the following abundances: 98.89% 12C and 1.11% 13C. Calculate the atomic mass of carbon.

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