Cells that identify pathogens and distinguish one from another are called

Which mathematical relationship should you us to convert moles of a substance into grams

Can someone me with questions 12 and 13 plz.

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