If you have ever made homemade ice cream,you know that you c

If you have ever made homemade ice cream,you know that you cool the milk and cream by immersing the container in ice and a concentrated solution of rock salt (NaCl) in water.If you want to have a water-salt solution that freezes at -6.°C,how many grams of NaCl must you add to 3.0 kg of water?(Assume the van't Hoff factor i for NaCl is 1.85.)