What is the older name for lanthanides and actinides?

Which sample at stp has the same number of atoms as 18 liters of ne at stp

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

How many moles of co2 are produced during the complete combustion of 3.6 moles of c2h6