What are the two things that might be found at the site of an excavation

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 much carbon is stored in the atmosphere as co2

The compound formed from 2 atoms of hydrogen and one atom of oxygen is