kstar0623 kstar0623 25-09-2022 Chemistry Answered 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 .