Which boundary is characterized by the creation of a mid-ocean ridge? a
All plate boundaries
b
Divergent
c
Convergent
d
Transform

When svante arrhenius first proposed his acid-base theory, he was a doctoral candidate. his professors thought his ideas were unfounded. within a decade, the arrhenius theory of acid-base was widely accepted and praised within the scientific world. arrhenius defined acids as compounds having ionizable hydrogen and bases as compounds with ionizable a) barium. b) hydronium. c) hydroxide. d) oxygen.

Can someone me with questions 12 and 13 plz.

Compare and contrast physical changes with chemical changes.