On a mission to a newly discovered planet, an astronaut finds gallium abundances of 60.11 % for 69Ga and 39.89 % for 71Ga. What is the atomic mass of gallium for this location? The mass of 69Ga is 68.7200 amu . The mass of 71Ga is 70.9200 amu . Express your answer to two decimal places, and include the appropriate units.

Chemistry for Engineering Students
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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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On a mission to a newly discovered planet, an astronaut finds gallium abundances of 60.11 % for 69Ga and 39.89 % for 71Ga. What is the atomic mass of gallium for this location?

The mass of 69Ga is 68.7200 amu . The mass of 71Ga is 70.9200 amu .

Express your answer to two decimal places, and include the appropriate units.

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