Concept explainers
RDA of Selenium The recommended daily allowance (RDA) of selenium in your diet is
Interpretation:
The number of atoms of selenium in given number of moles needs to be determined.
Concept introduction:
In 1 mol of any substance, there are
Explanation of Solution
There are
Thus, number of particles in given moles of substance can be calculated as follows:
Here, NA is Avogadro’s number and the value is equal to
The given number of moles of selenium element is
Putting the values,
Thus, the number of particles can be calculated from number of moles using Avogadro’s number. The calculated value is
Chapter 10 Solutions
Glencoe Chemistry: Matter and Change, Student Edition
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