A Magnesium Sulfate Heptahydrate Solution,which Is 18

Multiple Choice

A magnesium sulfate heptahydrate solution,which is 18.00% by weight in the anhydrous compound,has a density at 20 °C of 1.20 g/mL.What is the molality of the anhydrous compound in the solution? (Atomic masses in amu: H = 1.0,O = 16.0,S = 32.1,Mg = 24.3)

A) 5.54 M
B) 1.79 M
C) 1.82 M
D) 1.25 M
E) 1.49 M