What is the empirical formula for potassium oxide?

Subduction zones occur on earth where dense oceanic crust dives under more buoyant continental crust. these boundaries are characterized by a deep ocean trench next to a high continental mountain range, large numbers of earthquakes and volcanoes. all of this is further evidence for the a) big bang theory b) origin of the species eliminate c theory of plate tectonics d theory of natural selection 4 sedimentary rocks found high in the himalayen mountain

Iknow the answer to 13 is b and 14 is d. i just need to know why the correct answers are correct

Which fossil fuel is mainly used for heating and cooking? a. electricity b. coal c. petroleum d. natural gas