Problem: Silver is composed of two naturally occurring isotopes: Ag-107 (51.839%) and Ag-109. The ratio of the masses of the two isotopes is 1.0187.What is the mass of Ag-107?

FREE Expert Solution

We’re being asked to calculate the mass of silver-107 (Ag-107). We can use the following equation:


Atomic Mass=[mass×f.a.]isotope1 + [mass×f.a.]isotope 2



where atomic mass = average atomic mass of the element and f.a. = fractional abundance of the isotope. To get f.a., we simply need to divide the given percent abundance by 100.


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Problem Details

Silver is composed of two naturally occurring isotopes: Ag-107 (51.839%) and Ag-109. The ratio of the masses of the two isotopes is 1.0187.

What is the mass of Ag-107?

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