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

1 Answer

6 votes

Answer:

1.06x10²² formula units

Step-by-step 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
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