saabrrinnaaa saabrrinnaaa

29-10-2019
Chemistry

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please help me with this chemistry question, image attached

please help me with this chemistry question image attached class=

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cristisp93 cristisp93

09-11-2019

average atomic mass of Cu = 63.54

Explanation:

average atomic mass = atomic mass of isotope 1 × abundance of isotope 1 + atomic mass of isotope 2 × abundance of isotope 2 +...+ atomic mass of isotope n × abundance of isotope n

average atomic mass of Cu = atomic mass of Cu-63 × abundance of isotope Cu-63 + atomic mass of isotope Cu-65 × abundance of isotope Cu-65

average atomic mass of Cu = 62.93 × (69.17 / 100) + 64.93 × (30.83 / 100)

average atomic mass of Cu = 63.54

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