Answer: The number of formula units in the given amount of sodium oxide is [tex]1.5\times 10^{23}[/tex]
Explanation:
Formula units are defined as lowest whole number ratio of ions in an ionic compound. It is calculate by multiplying the number of moles by Avogadro's number which is [tex]6.022\times 10^{23}[/tex]
We are given:
Number of moles of sodium oxide = 0.25 moles
Number of formula units = [tex]0.25\times 6.022\times 10^{23}=1.5\times 10^{23}[/tex]
Hence, the number of formula units in the given amount of sodium oxide is [tex]1.5\times 10^{23}[/tex]
