A sealed flask contains 2.00 moles of helium and 3.00 moles of nitrogen. If the total pressure of the container is 200. KPa, what is the partial pressure of the nitrogen?

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.