What Is the Mass Percent of an Aqueous Sodium Hydroxide

Multiple Choice

What is the mass percent of an aqueous sodium hydroxide solution in which the molality of NaOH is 10.7 m? The density of the solution is 1.3311 g/mL.

A) 0.1%
B) 68.9%
C) 1.7%
D) 30.0%
E) 0.3%