The element copper exists in nature as two isotopes: 63 Cu has a mass of 62.9296 u and 65 Cu has a mass of 64.9278 u.The average atomic mass of copper is 63.55 u. Calculate the relative abundance of the two copper isotopes. % % 65 Cu 63 Cu

The element copper exists in nature as two isotopes: 63 Cu has a mass of 62.9296 u and 65 Cu has a mass of 64.9278 u.The average atomic mass of copper is 63.55 u. Calculate the relative abundance of the two copper isotopes. % % 65 Cu 63 Cu

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

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Concept explainers

Atoms and Molecules

An atom is the smallest unit of an element that possesses all the properties of that particular element. Molecules are the smallest unit of a substance that possess all the properties of that particular substance.

Question

The element copper exists in nature as two isotopes:
63 Cu has a mass of 62.9296 u and
65 Cu has a mass of 64.9278 u.The average atomic mass of copper is 63.55 u. Calculate the relative abundance of the two copper isotopes.
65
% Cu
%
63
Cu

What number of
Ni atoms and what amount (moles) of
Ni atoms are in 300.0 g of nickel?
atoms Ni
5.11
mol Ni

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Step 1: Determine the relative abundances of Cu isotopes and number of atoms and moles of Ni :

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Step 2: Calculation for relative abundance of each isotope:

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Step 3: Calculation for number of ni atoms in mass of ni:

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Step 4: Calculation for number of moles of ni in mass of ni:

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