a student is given a beaker containing a clear liquid. Her task is to determine if it is a mixture or a pure substance. It smells sweet. She guesses it might be sugar in water and tries to separate it with a filter paper. Nothing remains on the filter paper though so she concludes that the liquid is not a mixture.

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.