Electric current is the flow of particles with a. negative charge b. positive charge c. both positive and negative charges flowing opposite to each other. d. either positive or negative charge depending on the material

In which region is the substance in both the solid phase and the liquid phase? 1 2. 3 4 mark this and return save and exit next

What is the average rate of the reaction between 10 and 20 s?

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.