Caliche is made up mainly of sodium nitrate, which is soluble in water. You may assume that all the other substances present in caliche are insoluble in water. Describe the processes for obtaining pure, dry sodium nitrate crystals from caliche. Explain the purpose of each process.

How does a sample of helium at 15 degree celsius compare to a sample of helium at 215 k? a) the helium at 15 degrees celsius has a higher average kinetic energy that the sample at 215 k. b) the helium at 15 degrees celsius has lower nuclear energy that the sample at 215 k. c) the helium at 15 degrees celsius has slower- moving atoms that the sample at 215 k. d) the helium at 15 degrees celsius has smaller atoms than the sample at 215 k.