Catalysts work by lowering the __________ __________. What two words complete the sentence?

A catalyst speeds up a chemical reaction as a result of which of the following?Group of answer choices It provides an alternate pathway with a lower activation energy It increases the number of collisions between reacting molecules. It makes the reaction more endothermic.  It makes the reaction more exothermic

Catalysts are _____________________________changed during chemical reactions.

adding a catalyst increases the rate of reaction byA same reaction pathway and higher activation energyB providing an alternate pathway with lower activation energyC same reaction pathway and lower activation energyD providing an alternate pathway with higher activation

A catalyst is added to a reaction. Which of the following statements best describes the effect that a catalyst has on a reaction? Group of answer choicesThe catalyst gives the reactants more kinetic energyThe reaction rate is decreasedThe activation energy of the reaction is increasedThe activation energy of the reaction is decreased

Adding a catalyst increases the reaction rate by...