Pls which could be the catalyst in a chemical reaction? reactants product enzyme activated complex

How can carbon move from "land" to bodies of water? describe the way human impact has lead to increased levels of co2 in the atmosphere.

8) warming your hands by a fire is an example if which heat transfer? a. conduction b. convection c. radiation d. none of these

The reaction below shows a system in equilibrium. how would a decrease in temperature affect this reaction? a. the rate of formation of the gases would increase. b. the equilibrium of the reaction would shift to the left. c. the equilibrium would shift to cause the gases to sublime into solids. d. the chemicals on the left would quickly form the chemical on the right.