How many formula units of nano3 are in 9.82 moles of nano3 (mw. 85.00 g/mol)?

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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.

is an ionic compound. So, 1 mol of equals to formula units.

We are asked to calculate the number of formula units in 9.82 moles of  .

Given number of moles are multiplied by Avogadro number to get the number of formula units:

= formula units