A common practice in cooking is the addition of salt to boiling water (Kb = 0.52 Ckg/mole). One of the reasons for this might be to raise the...

A common practice in cooking is the addition of salt to boiling water (Kb = 0.52 ̊Ckg/mole). One of the reasons for this might be to raise the temperature of the boiling water. If 2.85 kg of water is boiling at 100 ̊C how much NaCl (MW = 58.44 g/mole) would need to be added to the water to increase the boiling point by 2 ̊C?

The answer I got was 39.4. I want someone to check my work.