Answer:
2.8 m
Explanation:
Step 1: Given data
- Moles of potassium bromide (solute): 0.210 mol
- Mass of water (solvent): 0.075 kg
Step 2: Calculate the molality of the solution
Molality is a unit used to express the concentration of a solution. It is equal to the moles of solute divided by the kilograms of solvent.
m = moles of solute / kilograms of solvent
m = 0.210 mol / 0.075 kg
m = 2.8 mol/kg = 2.8 m
