Question

What would you need to do to calculate the molality of 0.2 kg of NaCl in 3 kg

of water?
A. Convert the 3 kg of water to moles of water.
B. Convert the 3 kg of water to liters of water.
C. Convert the 0.2 kg of NaCl to grams of NaCl.
D. Convert the 0.2 kg of NaCl to moles of NaCl

Answer 1

D. Convert the 0.2 kg of NaCl to moles of NaCl

Step-by-step explanation:

The molality equation looks like this:

Molality = moles of solute / mass (kg) of solvent

In this case, the solute is NaCl and the solution is water. So, if you have been given NaCl in kg, you need to convert it to grams and then to moles in order to plug it into the equation.