Which statement best describes scientists who contributed to the current
body of scientific knowledge?
O
A. They were wealthy men during the 20th century.
O
B. They were mainly from European countries such as England and
France.
O
C. They were made up of men and women throughout history from
different countries.
D. They were mainly ancient philosophers whose theories stood the
test of time

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.