Final answer:
To find the number of moles of Ca(ClO4)2 from 4.70 x 10^24 formula units, divide by Avogadro's number (6.022 x 10^23), resulting in 7.80 moles of Ca(ClO4)2.
Step-by-step explanation:
To convert 4.70 x 1024 formula units of calcium perchlorate (Ca(ClO4)2) to moles, we use Avogadro's number, which is 6.022 x 1023 formula units per mole. The calculation is a straightforward dimensional analysis problem, employing the conversion factor between formula units and moles.
Conversion formula:
(4.70 x 1024 formula units Ca(ClO4)2) x (1 mole Ca(ClO4)2) / (6.022 x 1023 formula units) = moles of Ca(ClO4)2
Thus, the number of moles will be:
(4.70 x 1024) / (6.022 x 1023) = 7.80 moles of Ca(ClO4)2