Only two isotopes of copper occur naturally, 63Cu (atomic mass = 62.9296 amu; abundance 69.17%) and 63Cu (atomic mass = 64.9278 amu; abundance 30.83%). Calculate the atomic weight (average atomic mass) of copper.

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Expert Solution

The average atomic mass of copper can be determined by adding the atomic masses of two isotopes , each multiplied by its natural abundances.

So here, it will be given as :

M = [ (62.9296 x 69.17) + (64.9278 x 30.83) ] / 100

= [ 4352.840432 + 2001.724074] / 100

= 6354.564506 / 100

= 63.5456 amu

So the average atomic mass of copper will be 63.5456 amu.

Junaid answered 1 year ago

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