Where can most of the world's volcanoes be found? square of fire ring of fire ring of ice spot of lava

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.

Word equation for k+ h2o yield koh + h2

What is the most common reason for matter changing its state?