Question

how many grams of calcium nitrate need to be dissolved in 250 mL of water to form a solution that has a freezing temperature of -3.2 degrees C

Answer 1

delta T =i*Kf*molality
Solve for molality. i = 3

m = mols/kg solvent
Solve for moles.

moles = grams/molar mass
Solve for grams.