topic 7.2 solution concentration: molality

What is the molality of a solution made by dissolving 2.00 moles of NaOH in 400. grams of water?

• 5.00 molal

• 4.00 molal

• 3.00 molal

• 2.50 molal

What is the molality of a solution in which 168 grams of NaCl is dissolved in 1500g of water?

• 2.0 M

• 0.22 m

• 140 m

• 2.0 m

The density of aqueous solution containing 10.0% of ethanol, C₂H₅OH by mass is 0.984 g/mL. Calculate its molality.

• 2.31m

• 2.25m

• 2.42m

• 2.15m

Calculate the molality of 3.0M sucrose, C₁₂H₂₂O₁₁ if the density of the solution is 1.35 g/cm³.

• 9.26 m

• 9.20 m

• 9.19 m

• 9.23 m