1. Understand the Formula:
* NaCl dissociates into one sodium ion (Na+) and one chloride ion (Cl-) when dissolved in water.
2. Calculate the Number of Moles of Ions:
* Since each NaCl formula unit produces two ions, you have 0.20 moles of NaCl * 2 ions/formula unit = 0.40 moles of ions.
3. Convert Moles to Number of Ions:
* Use Avogadro's number (6.022 x 10^23 ions/mole) to convert moles of ions to the number of ions: 0.40 moles * 6.022 x 10^23 ions/mole = 2.41 x 10^23 ions.
Therefore, there are approximately 2.41 x 10^23 ions in 0.20 moles of sodium chloride.
