Question

What is the number of formula units in a 9.21 mol sample of CaO ?

Answer 1

5.546262 x 10^24 formula units

Step-by-step explanation:

Use avogadro's number

9.21 mol CaO ((6.022 x 10^23 formula units CaO)/1 mol CaO)) = 5.546 x 10^24.

I rounded to 3 sig figs.