49.5g of water becomes water vapor at its boiling point 100 degrees C. How many kJ of energy is required to evaporate this amount of water?

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

What is the polyatamic ion of borate

Which of these conditions most likely produces an unstable isotope?