How many holes are in your body? for example Mouth

Word equation for k+ h2o yield koh + h2

What produces wave a)sound b) heats c)transfer of energy d)vibrations

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.