Calculate the number of $Ca^{2+}$ ions in $222 \ g$ of anhydrous calcium chloride $(CaCl_2)$? (Atomic mass: $Ca = 40 \ u$,$Cl = 35.5 \ u$)
- A$N_{A}$
- B$2 \ N_{A}$
- C$3 \ N_{A}$
- D$4 \ N_{A}$
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