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The Average Atomic Mass of Zinc Is 65

Question 102

Multiple Choice

The average atomic mass of zinc is 65.39 amu. Given the data in the following table, what is the natural abundance of 66Zn? Isotope
Mass (amu)
Natural Abundance (%)
64Zn
63) 9291
48) 89
66Zn
65) 9260
?
67Zn
66) 9271
4) 11
68Zn
67) 9249
18) 56
70Zn
69) 9253
0) 62


A) 27.83%
B) 0.2783%
C) 50.00%
D) 2.783%
E) 28.73%

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