On a mission to a newly discovered planet, an astronaut finds gallium abundances of 61.29 % for 69Ga and 39.71 % for 71Ga. What s 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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