If the activation energy required for a chemical reaction were reduced, what would happen to the rate of the reaction? The rate would increase.
The rate would decrease.
The rate would remain the same.
The rate would go up and down.

The table below shows the elements that mainly comprise each of the four layers of earth: elements in layers layer main elements crust oxygen, silicon mantle iron, magnesium outer core iron, nickel inner core iron which of these elements make up the layer that is 0.2 to 1.1 percent of earth's total diameter?