Question

On a mission to a newly discovered planet, an astronaut finds copper abundances of 69.97 % for 63Cu and 31.03 % for 65Cu. What is the atomic mass of copper for this location?

The mass of 63Cu is 62.9300 amu . The mass of 65Cu is 64.9200 amu .
Express your answer to two decimal places, and include the appropriate units.

Answer 1

Alright, in order to solve this problem. Try to follow these exact same steps that will lead you to the atomic mass of Cu for that location.

(0.6997 x 62.9300) + (0.3103 x 64.9200) = 44.0321 + 20.1446

= 64.1767

The atomic mass of Cu in that location is appx. 64.18