What Is the Concentration of an AlCl₃ Solution If 150

What is the concentration of an AlCl₃ solution if 150.mL of the solution contains 450.mg of
Cl^- ion?

A) 2) 82 × 10^-2 M
B) 6) 75 × 10^-2 M
C) 8) 46 × 10^{- 2} M
D) 2) 54 × 10^-1 M