Answer:-
Solution:- For covalent compounds we consider molecules where as for the ionic compounds we consider the formula units. One mol of a covalent compound equals to Avogadro number of molecules. Similarly, for ionic compounds, one mol equals to Avogadro number of formula units.
[tex]NaNO_3[/tex] is an ionic compound. So, 1 mol of [tex]NaNO_3[/tex] equals to [tex]6.022*10^2^3[/tex] formula units.
We are asked to calculate the number of formula units in 9.82 moles of [tex]NaNO_3[/tex] .
Given number of moles are multiplied by Avogadro number to get the number of formula units:
[tex]9.82mol(\frac{6.022*10^2^3formula Units}{1mol})[/tex]
= [tex]5.91*10^2^4[/tex] formula units
