Last question seriously me asap tankyo

In this chemical reaction, 325 grams of barium (ba) react completely. how many moles of lithium (li) are produced?

Can someone me with 1 to 4 plz. fast

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.