Question

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

Answer 1

Answer:

1.06x10²² formula units

Explanation:

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

• 5.164 g ÷ 293.887 g/mol = 0.0176 mol

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

• 0.0176 mol * 6.023x10²³ FormulaUnits/mol = 1.06x10²² formula units