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Calcium chloride has the following formula: CaCl2
Based on this formula: one mole of calcium chloride contains two moles of chlorine

Therefore: two moles of calcium chloride would contain four moles of chlorine.

Number of atoms = number of moles x Avogadro's number
Number of atoms = 4 x 6.022 x 10^23 = 2.4088 x 10^24 atoms

Answer Calcium chloride has the molecular formula [tex]CaCl_{2}[/tex]  from which we can say that  one molecule of calcium chloride consist of one atom of calcium and two atoms of chlorine.

given : 2 mol of [tex]CaCl_{2}[/tex]

total moles of chlorine atoms = number of atoms in one mole  × number of formula units= 2×2= 4

Total number of atom = Total number of moles × Avogadro number

So, total number of chlorine atoms =

             4 × 6.0221×[tex]10^{23}[/tex] =2.4088×[tex]10^{24}[/tex] atoms


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