Which statement best describes the behavior of particles in a solid? a. they don’t move very much and do not change position. b. they crash into each other and bounce all around. c. they move very quickly and across great distances. d. they never move at all.

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answer: collecting information/data

reason: the student is going around and asking people questions to collect data

i hope this

the question isn't complete here so i can't right an answer '_'

it provides an alternative energy pathway for the reaction to proceed.

a catalyst is a substance that speeds up the rate of a chemical reaction but is not consumed during the course of the reaction.

catalysts increase the rate of reaction without being used up. they do this by lowering the activation energy needed. with a catalyst, more collisions result in a reaction, so the rate of reaction increases. different reactions need different catalysts.

a catalyst works by providing an alternative reaction pathway to the reaction product. the rate of the reaction is increased as this alternative route has a lower activation energy than the reaction route not mediated by the catalyst.