A teacher is demonstrating physical and chemical changes to her class. Which action should they use to demonstrate a chemical change?. Single choice. (5 Points)

Cutting a piece of paper with scissors.

Ripping a piece of paper with their hands.

Burning a piece of paper with a match.

Folding a piece of paper into an airplane.

Why do the strengths of london (dispersion) forces generally increase with increasing molecular size? choose one: a. heavier atoms have stronger attractions for each other than lighter atoms. b. dispersion forces are all equal in magnitude; there is no size dependence. c. dispersion forces arise from the attraction between the nuclei of atoms, and larger molecules have larger nuclei. d. dispersion forces arise from dipoles caused by the electron distribution being distorted. larger molecules have more electrons and, therefore, more distortions and a bigger force. e. dispersion forces depend on distance. larger molecules are farther apart and so the forces are smaller.