Given the balanced equation representing a reaction:

Fe2O3 + 2Al Al2O3 + 2Fe

During this reaction, the oxidation number of Al changes from

A) +3 to 0 as electrons are transferred

B) +3 to 0 as protons are transferred

C) 0 to +3 as electrons are transferred

D) 0 to +3 as protons are transferred

Read these sentences from the text. near the equator, the tropics receive the most rain on a consistent basis. as a result, the fresh water falling into the ocean decrease the salinity of the surface water in that region. [. .] . . as the salt content of sea water increases, so does its density. what can you infer about how rain affects the density of surface water near the equator?

The diagram shows the structures of horse and cat forelimbs. what does the diagram suggest about the evolutionary relationship between these two mammals? a. they have homologous structures, indicating a common ancestor. b. they have analogous structures, indicating a common ancestor. c. they have homologous structures, indicating that they do not have a common ancestor. d. they have analogous structures, indicating that they do not have a common ancestor.

Explain the relationship between forward and backward reactions in equilibrium, and predict how changing the amount of a reactant (creating a tension) will affect that relationship.