RAGETTA i need help on a QUIZ

Which statement is usually true about the relationship between activation energy and reaction rates? low activation energy barriers result in low rates. high activation energy barriers result in low rates. low activation energy barriers result in no reaction. high activation energy barriers result in no reaction.

How do you identify the anode on a power source such as a battery? how do you identify the cathode? how are terms anion and cation?

What substance has a mass of 9.5g and volume of 2.1cm^3