What do you think a chemical change is?

In the following redox reaction which is the oxidizing agent and which is the reducing agent? alcl3 + na nacl + al

Match the mixture with the substance// i really need on this guys (it’s a pic btw)

Which statement is true about a catalyst? a: a catalyst decreases the rate of the reaction. b. a catalyst is consumed during a chemical reaction. c. a catalyst lowers the activation energy of a reaction. d. a catalyst increases the reactant concentration during a reaction.