Gallium has two isotopes, 69Ga and 71Ga; 60.11 % of gallium is 69Ga and 39.89 %...

Gallium has two isotopes, 69Ga and 71Ga; 60.11 % of gallium is 69Ga and 39.89 % is 71Ga. The atomic mass of 69Ga is 68.926 amu and the atomic mass of 71Ga is 70.925 amu . What is the atomic weight of gallium?

Expert Solution

Ans. Average atomic weight of Ga = (% ⁶⁹Ga x its atomic mass) + (% ⁷¹Ga x its atomic mass)

= (60.11 % x 68.926 amu) + (39.89 % x 70.925)

= 41.4314186 amu + 28.2919825 amu

= 69.7234 amu

queen_honey_blossom answered 2 years ago

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