In the photo, the juice is shown in its solid-state on the left and in its liquid state on the right. What appears to have changed about the juice when it changed state?

Which actions would increase the rate at salt dissolves in water? stir the water? crush the salt? use less water? heat the water? cool the salt

What is the relation between concentration of reactants and the rate of chemical reaction?

An electron moved from shell n = 2 to shell n = 1. what most likely happened during the transition? a fraction of a photon was added. a photon of energy was absorbed. a fraction of a photon was removed. a photon of energy was released.