How many chloride ions are present in 0.100 mol of MgCl₂?

Name: How many chloride ions are present in 0.100 mol of MgCl 2 ?
Brand: Quizplus
Rating: 4.8 (47 reviews)

Question

Quizplus · Accepted Answer

In one mole of MgCl2, there are 2 moles of chloride ions. Therefore, in 0.100 mol of MgCl2, there would be 2 x 0.100 = 0.200 moles of chloride ions. 
To convert moles to number of ions, we use Avogadro's number (6.02 x 10^23 ions/mol). 
0.200 mol x 6.02 x 10^23 ions/mol = 1.20 x 10^23 chloride ions. 
Therefore, the answer is C, 1.20 x 10^23 Cl- ions.

How Many Chloride Ions Are Present in 0