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Question
In: Chemistry
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.
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.
Solutions
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.
So the average atomic mass of copper will be 63.5456 amu.
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