How many Cal2 formula units are present
in 5.164 g of Call2?

1.06x10²² formula units

Explanation:

First we convert 5.164 g of CaI₂ into moles, using its molar mass:

Then we convert 0.0176 moles into formula units, using Avogadro's number, which relates the number of formula units present in 1 mol:

geosphere and hydrosphere.

this is because the geosphere has to do with geological events, while the hydrosphere controls all water on earth.