Question

HELP⚠️

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

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

-Express you’re answer to two decimal places, and include the appropriate units

Answer 1

Step-by-step explanation:

The atomic mass of gallium for this location can be calculated using the following formula:

Atomic mass = (69^Ga abundance x 69^Ga mass) + (71^Ga abundance x 71^Ga mass)

Plugging in the values:

Atomic mass = (0.6011 x 68.7200 amu) + (0.3989 x 70.9200 amu) = 41.4762 amu + 28.2957 amu = 69.7719 amu

Therefore, the atomic mass of gallium for this location is 69.77 amu.