Answer:
157.79 g
Explanation:
The definition of molality is:
- molality = moles of solute / kilogram of solvent
This means that in a 2.7 molal solution, there are 2.7 moles of NaCl per kilogram of water.
So now we convert those 2.7 moles of NaCl to grams, using its molar mass:
- 2.7 mol * 58.44 g/mol = 157.79 g
