Question

How many formula units of NaNO3 are in 9.82 moles of NaNO3 (Mw. 85.00 g/mol)?

Answer 1

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.

`NaNO_3` is an ionic compound. So, 1 mol of
`NaNO_3` equals to
`6.022*10^2^3` formula units.

We are asked to calculate the number of formula units in 9.82 moles of
`NaNO_3` .

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

`9.82mol((6.022*10^2^3formula Units)/(1mol))`

=
`5.91*10^2^4` formula units