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%

---

Definitions:

Direct Labor Rate

The cost per hour for direct labor applied to the production of goods or services.

Direct Labor-Hours

The sum of hours spent by workers directly engaged in producing a good or delivering a service.

Schedule of Expected Cash Collections

A financial report that outlines the anticipated inflow of cash from receivables or other income sources over a specific time period.

Merchandise Purchases Budget

A financial plan that estimates the cost of goods a retail company needs to purchase over a specific period to meet expected sales.