Which is an example of a chemical change? a).mixing of poster colors b).formation of clouds c).metal corroding in salt water d).sugar dissolving in water e).separating salt from seawater

How does a catalyst increase the speed of a reaction? a. the catalyst eliminates the activated complex stage, allowing products to form immediately. b. the catalyst lowers the energy level of the reactants, making it easier for them to react. c. the catalyst makes it easier for the activated complex to form, lowering the activation energy. d. the catalyst raises the energy level of the products, making the reaction finish sooner. reset next