A 4691 G Sample of MgCl₂ Is Dissolved in Enough Water

Multiple Choice

A 4.691 g sample of MgCl₂ is dissolved in enough water to give 750.mL of solution.What is the magnesium ion concentration in this solution?

A) 3.70 × 10^-2 M
B) 1.05 × 10^-2 M
C) 6.57 × 10^-2 M
D) 4.93 × 10^-2 M
E) 0.131 M