Pls show ur work will mark the brainliest

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.

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

If 3 moles of a compound use 24 j of energy in a reaction, what is the a hreaction in j/mol?