22 you have the following acids and their conjugate bases available: acetic acid: ch 3cooh/ch3coo-; ka = 1.8 × 10-5 carbonic acid: h2co3/hco3-; ka = 4.2 × 10-7 formic acid: hcooh/hcoo-; ka = 1.8 × 10-4 hydrofluoric acid: hf/f-; ka = 7.2 × 10-4 which of these acid/conjugate base pairs would be the best choice for a buffer in the range of ph 4.5? hydrofluoric acid formic acid acetic acid carbonic acid

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

The difference between the atomic number of an element and the element’s atomic mass is the number of ions.

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