Obsidian is formed when rapidly cooling ions are randomly distributed, creating a texture. fine-grained coarse-grained glassy porphyritic

Note the ph and poh values labeled with letters on the ph scale below. based on log rules and the way ph is calculated, what is the difference in [oh– ] concentration between point a and point b. a) 10^1 b) 10^5 c) 10^6 d) 10^7

What is the percent by mass of oxygen in fe2o3

Amixture with the same composition throughout is!