Draw a six-carbon-chain portion from isotactic polypropylene, in which all of the CH3 groups point in the same direction, that is, either all behind or all in front of the plane of the computer screen. X represents the continuation of the polymer chain. Do not add any bonds to X.

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.