In the reaction: H3O+ + OH- - 2 H20, the oxidation number of oxygen:

Which traits do human embryos have that link them to a common ancestor with fish and reptiles? a. scales and tail b. gill slits and scales c. tail and gill slits d. hair and tail

The name of the ion, s2-, is: sulfurous ion sulfide ion sulfur ion sulfate ion

Asolid that forms and separates from a liquid mixture is called